diff --git a/src/components/business/CommentItem.tsx b/src/components/business/CommentItem.tsx
index 305eabe..41c8f4e 100644
--- a/src/components/business/CommentItem.tsx
+++ b/src/components/business/CommentItem.tsx
@@ -29,6 +29,7 @@ interface CommentItemProps {
   onDelete?: (comment: Comment) => void; // 删除评论的回调
   onImagePress?: (images: ImageGridItem[], index: number) => void; // 点击图片查看大图
   currentUserId?: string; // 当前用户ID，用于判断子评论作者
+  onReport?: (comment: Comment) => void; // 举报评论的回调
 }
 
 function createCommentItemStyles(colors: AppColors) {
diff --git a/src/components/business/PostCard/types.ts b/src/components/business/PostCard/types.ts
index 5585ced..f367321 100644
--- a/src/components/business/PostCard/types.ts
+++ b/src/components/business/PostCard/types.ts
@@ -22,7 +22,8 @@ export type PostCardActionType =
   | 'unbookmark' // 取消收藏
   | 'share' // 分享
   | 'imagePress' // 点击图片
-  | 'delete'; // 删除
+  | 'delete' // 删除
+  | 'report'; // 举报
 
 /**
  * Action payload 类型
diff --git a/src/components/business/ReportDialog/ReportDialog.tsx b/src/components/business/ReportDialog/ReportDialog.tsx
new file mode 100644
index 0000000..cead925
--- /dev/null
+++ b/src/components/business/ReportDialog/ReportDialog.tsx
@@ -0,0 +1,335 @@
+/**
+ * 举报对话框组件
+ * 支持举报帖子、评论、消息
+ */
+
+import React, { useState, useCallback } from 'react';
+import {
+  Modal,
+  View,
+  Text,
+  TouchableOpacity,
+  StyleSheet,
+  ScrollView,
+  TextInput,
+  ActivityIndicator,
+  Alert,
+} from 'react-native';
+import { MaterialCommunityIcons } from '@expo/vector-icons';
+import { useAppColors } from '../../../theme';
+import { spacing, borderRadius, fontSizes } from '../../../theme';
+import reportService, { ReportReason, ReportTargetType, REPORT_REASONS } from '../../../services/reportService';
+
+export interface ReportDialogProps {
+  visible: boolean;
+  targetType: ReportTargetType;
+  targetId: string;
+  onClose: () => void;
+  onSuccess?: () => void;
+}
+
+// 目标类型中文名称映射
+const TARGET_TYPE_LABELS: Record<ReportTargetType, string> = {
+  post: '帖子',
+  comment: '评论',
+  message: '消息',
+};
+
+export const ReportDialog: React.FC<ReportDialogProps> = ({
+  visible,
+  targetType,
+  targetId,
+  onClose,
+  onSuccess,
+}) => {
+  const colors = useAppColors();
+  const styles = useStyles(colors);
+  const [selectedReason, setSelectedReason] = useState<ReportReason | null>(null);
+  const [description, setDescription] = useState('');
+  const [submitting, setSubmitting] = useState(false);
+
+  // 提交举报
+  const handleSubmit = useCallback(async () => {
+    if (!selectedReason) {
+      Alert.alert('提示', '请选择举报原因');
+      return;
+    }
+
+    setSubmitting(true);
+    try {
+      const result = await reportService.createReport(
+        targetType,
+        targetId,
+        selectedReason,
+        description.trim() || undefined
+      );
+
+      if (result) {
+        Alert.alert('举报成功', '感谢您的反馈，我们会尽快处理', [
+          {
+            text: '确定',
+            onPress: () => {
+              onClose();
+              onSuccess?.();
+            },
+          },
+        ]);
+      } else {
+        Alert.alert('举报失败', '请稍后重试');
+      }
+    } catch (error) {
+      console.error('Submit report error:', error);
+      Alert.alert('举报失败', '网络错误，请稍后重试');
+    } finally {
+      setSubmitting(false);
+    }
+  }, [selectedReason, description, targetType, targetId, onClose, onSuccess]);
+
+  // 重置状态
+  const handleClose = useCallback(() => {
+    setSelectedReason(null);
+    setDescription('');
+    onClose();
+  }, [onClose]);
+
+  return (
+    <Modal
+      visible={visible}
+      transparent
+      animationType="fade"
+      onRequestClose={handleClose}
+    >
+      <View style={styles.overlay}>
+        <View style={styles.container}>
+          {/* 头部 */}
+          <View style={styles.header}>
+            <Text style={styles.title}>
+              举报{TARGET_TYPE_LABELS[targetType]}
+            </Text>
+            <TouchableOpacity
+              style={styles.closeButton}
+              onPress={handleClose}
+              disabled={submitting}
+            >
+              <MaterialCommunityIcons
+                name="close"
+                size={24}
+                color={colors.textSecondary}
+              />
+            </TouchableOpacity>
+          </View>
+
+          {/* 内容 */}
+          <ScrollView style={styles.content} showsVerticalScrollIndicator={false}>
+            {/* 举报原因选择 */}
+            <Text style={styles.sectionTitle}>请选择举报原因</Text>
+            <View style={styles.reasonList}>
+              {REPORT_REASONS.map((item) => (
+                <TouchableOpacity
+                  key={item.value}
+                  style={[
+                    styles.reasonItem,
+                    selectedReason === item.value && styles.reasonItemSelected,
+                  ]}
+                  onPress={() => setSelectedReason(item.value)}
+                  disabled={submitting}
+                >
+                  <View style={styles.radioContainer}>
+                    <View
+                      style={[
+                        styles.radio,
+                        selectedReason === item.value && styles.radioSelected,
+                      ]}
+                    >
+                      {selectedReason === item.value && (
+                        <View style={styles.radioDot} />
+                      )}
+                    </View>
+                    <Text style={styles.reasonLabel}>{item.label}</Text>
+                  </View>
+                </TouchableOpacity>
+              ))}
+            </View>
+
+            {/* 补充说明 */}
+            <Text style={styles.sectionTitle}>补充说明（选填）</Text>
+            <TextInput
+              style={styles.textInput}
+              placeholder="请提供更多详细信息..."
+              placeholderTextColor={colors.textTertiary}
+              multiline
+              maxLength={500}
+              value={description}
+              onChangeText={setDescription}
+              editable={!submitting}
+            />
+            <Text style={styles.charCount}>{description.length}/500</Text>
+          </ScrollView>
+
+          {/* 底部按钮 */}
+          <View style={styles.footer}>
+            <TouchableOpacity
+              style={styles.cancelButton}
+              onPress={handleClose}
+              disabled={submitting}
+            >
+              <Text style={styles.cancelButtonText}>取消</Text>
+            </TouchableOpacity>
+            <TouchableOpacity
+              style={[
+                styles.submitButton,
+                (!selectedReason || submitting) && styles.submitButtonDisabled,
+              ]}
+              onPress={handleSubmit}
+              disabled={!selectedReason || submitting}
+            >
+              {submitting ? (
+                <ActivityIndicator size="small" color="#FFFFFF" />
+              ) : (
+                <Text style={styles.submitButtonText}>提交举报</Text>
+              )}
+            </TouchableOpacity>
+          </View>
+        </View>
+      </View>
+    </Modal>
+  );
+};
+
+// 创建样式
+const useStyles = (colors: ReturnType<typeof useAppColors>) =>
+  StyleSheet.create({
+    overlay: {
+      flex: 1,
+      backgroundColor: 'rgba(0, 0, 0, 0.5)',
+      justifyContent: 'center',
+      alignItems: 'center',
+      padding: spacing.lg,
+    },
+    container: {
+      backgroundColor: colors.backgroundPrimary,
+      borderRadius: borderRadius.lg,
+      width: '100%',
+      maxWidth: 400,
+      maxHeight: '80%',
+    },
+    header: {
+      flexDirection: 'row',
+      justifyContent: 'space-between',
+      alignItems: 'center',
+      padding: spacing.lg,
+      borderBottomWidth: 1,
+      borderBottomColor: colors.borderLight,
+    },
+    title: {
+      fontSize: fontSizes.lg,
+      fontWeight: '600',
+      color: colors.textPrimary,
+    },
+    closeButton: {
+      padding: spacing.xs,
+    },
+    content: {
+      padding: spacing.lg,
+      maxHeight: 400,
+    },
+    sectionTitle: {
+      fontSize: fontSizes.md,
+      fontWeight: '500',
+      color: colors.textPrimary,
+      marginBottom: spacing.sm,
+    },
+    reasonList: {
+      marginBottom: spacing.lg,
+    },
+    reasonItem: {
+      paddingVertical: spacing.sm,
+      borderBottomWidth: 1,
+      borderBottomColor: colors.borderLight,
+    },
+    reasonItemSelected: {
+      backgroundColor: colors.backgroundSecondary,
+      marginHorizontal: -spacing.sm,
+      paddingHorizontal: spacing.sm,
+      borderRadius: borderRadius.sm,
+    },
+    radioContainer: {
+      flexDirection: 'row',
+      alignItems: 'center',
+    },
+    radio: {
+      width: 20,
+      height: 20,
+      borderRadius: 10,
+      borderWidth: 2,
+      borderColor: colors.border,
+      justifyContent: 'center',
+      alignItems: 'center',
+      marginRight: spacing.sm,
+    },
+    radioSelected: {
+      borderColor: colors.primary,
+    },
+    radioDot: {
+      width: 10,
+      height: 10,
+      borderRadius: 5,
+      backgroundColor: colors.primary,
+    },
+    reasonLabel: {
+      fontSize: fontSizes.md,
+      color: colors.textPrimary,
+    },
+    textInput: {
+      borderWidth: 1,
+      borderColor: colors.border,
+      borderRadius: borderRadius.md,
+      padding: spacing.sm,
+      fontSize: fontSizes.md,
+      color: colors.textPrimary,
+      minHeight: 100,
+      textAlignVertical: 'top',
+    },
+    charCount: {
+      fontSize: fontSizes.sm,
+      color: colors.textTertiary,
+      textAlign: 'right',
+      marginTop: spacing.xs,
+    },
+    footer: {
+      flexDirection: 'row',
+      padding: spacing.lg,
+      borderTopWidth: 1,
+      borderTopColor: colors.borderLight,
+      gap: spacing.sm,
+    },
+    cancelButton: {
+      flex: 1,
+      paddingVertical: spacing.sm,
+      borderRadius: borderRadius.md,
+      borderWidth: 1,
+      borderColor: colors.border,
+      alignItems: 'center',
+    },
+    cancelButtonText: {
+      fontSize: fontSizes.md,
+      color: colors.textSecondary,
+    },
+    submitButton: {
+      flex: 1,
+      paddingVertical: spacing.sm,
+      borderRadius: borderRadius.md,
+      backgroundColor: colors.primary,
+      alignItems: 'center',
+    },
+    submitButtonDisabled: {
+      backgroundColor: colors.primary + '60',
+    },
+    submitButtonText: {
+      fontSize: fontSizes.md,
+      color: '#FFFFFF',
+      fontWeight: '500',
+    },
+  });
+
+export default ReportDialog;
\ No newline at end of file
diff --git a/src/components/business/ReportDialog/index.ts b/src/components/business/ReportDialog/index.ts
new file mode 100644
index 0000000..1dcc04a
--- /dev/null
+++ b/src/components/business/ReportDialog/index.ts
@@ -0,0 +1,2 @@
+export { ReportDialog } from './ReportDialog';
+export type { ReportDialogProps } from './ReportDialog';
\ No newline at end of file
diff --git a/src/components/business/index.ts b/src/components/business/index.ts
index 91395e8..1269082 100644
--- a/src/components/business/index.ts
+++ b/src/components/business/index.ts
@@ -22,3 +22,4 @@ export { default as TabBar } from './TabBar';
 export { default as VoteCard } from './VoteCard';
 export { default as VoteEditor } from './VoteEditor';
 export { default as VotePreview } from './VotePreview';
+export { default as ReportDialog } from './ReportDialog';
diff --git a/src/screens/message/components/ChatScreen/types.ts b/src/screens/message/components/ChatScreen/types.ts
index e803f02..20a1389 100644
--- a/src/screens/message/components/ChatScreen/types.ts
+++ b/src/screens/message/components/ChatScreen/types.ts
@@ -166,6 +166,7 @@ export interface LongPressMenuProps {
   onRecall: (messageId: string) => void;
   onDelete: (messageId: string) => void;
   onAddSticker?: (imageUrl: string) => void;
+  onReport?: (message: GroupMessage) => void; // 举报消息回调
 }
 
 // 聊天头部 Props
diff --git a/src/services/reportService.ts b/src/services/reportService.ts
new file mode 100644
index 0000000..2cf1b4e
--- /dev/null
+++ b/src/services/reportService.ts
@@ -0,0 +1,83 @@
+/**
+ * 举报服务
+ * 处理帖子、评论、消息的举报功能
+ */
+
+import { api } from './api';
+
+// 举报原因类型
+export type ReportReason = 'spam' | 'inappropriate' | 'harassment' | 'misinformation' | 'other';
+
+// 举报目标类型
+export type ReportTargetType = 'post' | 'comment' | 'message';
+
+// 创建举报请求
+interface CreateReportRequest {
+  target_type: ReportTargetType;
+  target_id: string;
+  reason: ReportReason;
+  description?: string;
+}
+
+// 举报响应
+export interface ReportResponse {
+  id: string;
+  reporter_id: string;
+  target_type: ReportTargetType;
+  target_id: string;
+  reason: ReportReason;
+  description?: string;
+  status: 'pending' | 'processing' | 'resolved' | 'rejected';
+  created_at: string;
+}
+
+// 举报原因选项
+export const REPORT_REASONS: { value: ReportReason; label: string }[] = [
+  { value: 'spam', label: '垃圾广告' },
+  { value: 'inappropriate', label: '违规内容' },
+  { value: 'harassment', label: '辱骂/攻击' },
+  { value: 'misinformation', label: '虚假信息' },
+  { value: 'other', label: '其他' },
+];
+
+// 举报服务类
+class ReportService {
+  /**
+   * 创建举报
+   * @param targetType 举报目标类型
+   * @param targetId 目标ID
+   * @param reason 举报原因
+   * @param description 详细描述（可选）
+   */
+  async createReport(
+    targetType: ReportTargetType,
+    targetId: string,
+    reason: ReportReason,
+    description?: string
+  ): Promise<ReportResponse | null> {
+    try {
+      const request: CreateReportRequest = {
+        target_type: targetType,
+        target_id: targetId,
+        reason,
+        description,
+      };
+      const response = await api.post<ReportResponse>('/reports', request);
+      return response.data;
+    } catch (error) {
+      console.error('创建举报失败:', error);
+      return null;
+    }
+  }
+
+  /**
+   * 获取举报原因标签
+   */
+  getReasonLabel(reason: ReportReason): string {
+    const item = REPORT_REASONS.find(r => r.value === reason);
+    return item?.label ?? reason;
+  }
+}
+
+export const reportService = new ReportService();
+export default reportService;