diff --git a/proxy/translator.go b/proxy/translator.go
index 4c5dc62..1c11fd7 100644
--- a/proxy/translator.go
+++ b/proxy/translator.go
@@ -280,10 +280,10 @@ func ClaudeToKiro(req *ClaudeRequest, thinking bool) *KiroPayload {
 
 	history = trimLeadingAssistantHistory(history)
 
-	// 构建最终内容
+	// 构建最终内容（系统提示直接拼接，不加 --- SYSTEM PROMPT --- 标记以避免 Kiro 将其识别为注入攻击）
 	finalContent := ""
 	if systemPrompt != "" {
-		finalContent = "--- SYSTEM PROMPT ---\n" + systemPrompt + "\n--- END SYSTEM PROMPT ---\n\n"
+		finalContent = systemPrompt + "\n\n"
 	}
 	if currentContent != "" {
 		finalContent += currentContent