diff --git a/src/services/subtitleBgmGenerate.js b/src/services/subtitleBgmGenerate.js
index df522d3..d5f2e44 100644
--- a/src/services/subtitleBgmGenerate.js
+++ b/src/services/subtitleBgmGenerate.js
@@ -78,7 +78,7 @@ export async function executeGenerateSubtitleAndBgm(store) {
       backgroundOpacity: 0,
       position: "bottom",
       fontSizeScale: 100,
-      maxCharsPerLine: 20,
+      maxCharsPerLine: 18,
     };
   }
 
diff --git a/src/utils/subtitlePreviewStyle.js b/src/utils/subtitlePreviewStyle.js
index 73bec54..fb7f367 100644
--- a/src/utils/subtitlePreviewStyle.js
+++ b/src/utils/subtitlePreviewStyle.js
@@ -289,6 +289,6 @@ export function buildSubtitleBurnStyle(template) {
     position:
       template?.config?.subtitlePosition || style.position || "bottom",
     fontSizeScale: Number(template?.config?.subtitleFontSizeScale) || 100,
-    maxCharsPerLine: 20,
+    maxCharsPerLine: 18,
   };
 }