diff --git a/pkg/service/cast/report.go b/pkg/service/cast/report.go
index 1415983b..a4331f62 100644
--- a/pkg/service/cast/report.go
+++ b/pkg/service/cast/report.go
@@ -138,6 +138,9 @@ func CreateCompetitiveReportCore(ctx *gin.Context, req *cast.CreateCompetitiveRe
 		competitorReportData.ImageURL = req.ImageUrl
 	}
 
+	// 截断超长字段（按AI生成的字段长度要求）
+	competitorReportData = truncateCompetitorReportData(competitorReportData)
+
 	zap.L().Info("解析成功", zap.Any("competitorReportData", competitorReportData))
 
 	today := time.Now().Format("20060102")
@@ -411,6 +414,9 @@ func ImportCompetitiveReportBatch(ctx *gin.Context) {
 		competitorReportData.HighlightAnalysis = highlightAnalysis
 		competitorReportData.DataPerformance = dataPerformance
 
+		// 截断超长字段（按AI生成的字段长度要求）
+		competitorReportData = truncateCompetitorReportData(competitorReportData)
+
 		// 验证必填字段
 		if artistNum == "" {
 			temp.Remark = "艺人编号不能为空"
@@ -1309,3 +1315,38 @@ func checkAndReuploadImageForReport(imageUrl string) (string, error) {
 
 	return compressUrl, nil
 }
+
+// truncateCompetitorReportData 截断竞品报告数据中超长的字段
+// 字段长度要求参考 AI 生成竞品报告的限制
+func truncateCompetitorReportData(data utils.CompetitorReportData) utils.CompetitorReportData {
+	// 字段长度限制
+	const (
+		MaxSummary        = 78  // 概述
+		MaxPointField     = 60  // 标题/题材/内容/文案/数据/配乐亮点
+		MaxViews          = 60  // 浏览量
+		MaxCompletion     = 60  // 完播率
+		MaxEngagement     = 60  // 点赞/分享/评论
+		MaxOverallSummary = 300 // 整体总结及可优化建议
+	)
+
+	// 截断亮点分析摘要
+	data.HighlightAnalysis.Summary = utils.TruncateTextByRune(data.HighlightAnalysis.Summary, MaxSummary)
+
+	// 截断各亮点字段
+	data.HighlightAnalysis.Points.Theme = utils.TruncateTextByRune(data.HighlightAnalysis.Points.Theme, MaxPointField)
+	data.HighlightAnalysis.Points.Narrative = utils.TruncateTextByRune(data.HighlightAnalysis.Points.Narrative, MaxPointField)
+	data.HighlightAnalysis.Points.Content = utils.TruncateTextByRune(data.HighlightAnalysis.Points.Content, MaxPointField)
+	data.HighlightAnalysis.Points.Copywriting = utils.TruncateTextByRune(data.HighlightAnalysis.Points.Copywriting, MaxPointField)
+	data.HighlightAnalysis.Points.Data = utils.TruncateTextByRune(data.HighlightAnalysis.Points.Data, MaxPointField)
+	data.HighlightAnalysis.Points.Music = utils.TruncateTextByRune(data.HighlightAnalysis.Points.Music, MaxPointField)
+
+	// 截断数据表现字段
+	data.DataPerformance.Views = utils.TruncateTextByRune(data.DataPerformance.Views, MaxViews)
+	data.DataPerformance.Completion = utils.TruncateTextByRune(data.DataPerformance.Completion, MaxCompletion)
+	data.DataPerformance.Engagement = utils.TruncateTextByRune(data.DataPerformance.Engagement, MaxEngagement)
+
+	// 截断整体总结
+	data.OverallSummary = utils.TruncateTextByRune(data.OverallSummary, MaxOverallSummary)
+
+	return data
+}
diff --git a/pkg/utils/pdf.go b/pkg/utils/pdf.go
index a1ce80d7..4b824ea4 100644
--- a/pkg/utils/pdf.go
+++ b/pkg/utils/pdf.go
@@ -508,6 +508,30 @@ func splitTextByRune(text string, maxWidth float64) []string {
 	return lines
 }
 
+// TruncateTextByRune 按字符权重截断文本
+// 中文字符算1.0，英文字母/数字/英文符号算0.5
+// 返回截断后的文本，确保总权重不超过maxWidth
+func TruncateTextByRune(text string, maxWidth float64) string {
+	if text == "" {
+		return ""
+	}
+
+	runes := []rune(text)
+	var result []rune
+	currentWidth := 0.0
+
+	for _, r := range runes {
+		charWidth := getCharWidth(r)
+		if currentWidth+charWidth > maxWidth {
+			break
+		}
+		result = append(result, r)
+		currentWidth += charWidth
+	}
+
+	return string(result)
+}
+
 // ConvertCompetitorReportToText 将竞品报告数据转换为文本格式
 // 参数:
 //   - data: 竞品报告数据
diff --git a/pkg/utils/pdf_competitor_test.go b/pkg/utils/pdf_competitor_test.go
index 5b8414fb..9dae6a7b 100644
--- a/pkg/utils/pdf_competitor_test.go
+++ b/pkg/utils/pdf_competitor_test.go
@@ -221,3 +221,84 @@ func TestGenerateCompetitorReportPDFMixedContent(t *testing.T) {
 
 	fmt.Printf("PDF生成成功（中英混合测试）: %s\n", outputPath)
 }
+
+// TestTruncateTextByRune 测试按字符权重截断文本
+func TestTruncateTextByRune(t *testing.T) {
+	tests := []struct {
+		name     string
+		text     string
+		maxWidth float64
+		want     string
+	}{
+		{
+			name:     "空文本",
+			text:     "",
+			maxWidth: 10,
+			want:     "",
+		},
+		{
+			name:     "纯中文截断",
+			text:     "这是一段很长的中文内容需要被截断",
+			maxWidth: 10,
+			want:     "这是一段很长的中文内", // 10个中文字=10，正好
+		},
+		{
+			name:     "纯英文截断（按0.5计算）",
+			text:     "abcdefghijklmnop",
+			maxWidth: 5,
+			want:     "abcdefghij", // 10个字母=5.0，正好
+		},
+		{
+			name:     "数字截断（按0.5计算）",
+			text:     "1234567890",
+			maxWidth: 3,
+			want:     "123456", // 6个数字=3.0，正好
+		},
+		{
+			name:     "中英混合截断",
+			text:     "hello你好world世界",
+			maxWidth: 6,
+			// h(0.5)+e(0.5)+l(0.5)+l(0.5)+o(0.5)=2.5
+			// +你(1)+好(1)=4.5
+			// +w(0.5)+o(0.5)+r(0.5)+l(0.5)=2，再加就超过6了
+			// 所以应该是 hello你好wor
+			want: "hello你好wor",
+		},
+		{
+			name:     "符号截断（按0.5计算）",
+			text:     "hello,world!",
+			maxWidth: 5,
+			// h(0.5)+e(0.5)+l(0.5)+l(0.5)+o(0.5)+,(0.5)=3
+			// +w(0.5)+o(0.5)+r(0.5)+l(0.5)+d(0.5)+!(0.5)=6，超过5
+			// 所以保留 hello,worl
+			want: "hello,worl",
+		},
+		{
+			name:     "截断到正好边界",
+			text:     "中文字符",
+			maxWidth: 4,
+			want:     "中文字符", // 4个中文字=4.0，正好
+		},
+		{
+			name:     "宽度为0",
+			text:     "hello",
+			maxWidth: 0,
+			want:     "",
+		},
+		{
+			name:     "宽度小于单个字符",
+			text:     "hello",
+			maxWidth: 0.3,
+			want:     "",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := TruncateTextByRune(tt.text, tt.maxWidth)
+			if got != tt.want {
+				t.Errorf("TruncateTextByRune(%q, %v) = %q, want %q", tt.text, tt.maxWidth, got, tt.want)
+			}
+		})
+	}
+}