diff --git a/src/main/java/com/huangge1199/ai/config/SafeInputGuardrail.java b/src/main/java/com/huangge1199/ai/config/SafeInputGuardrail.java
new file mode 100644
index 0000000..51b0d70
--- /dev/null
+++ b/src/main/java/com/huangge1199/ai/config/SafeInputGuardrail.java
@@ -0,0 +1,37 @@
+package com.huangge1199.ai.config;
+
+import dev.langchain4j.data.message.UserMessage;
+import dev.langchain4j.guardrail.InputGuardrail;
+import dev.langchain4j.guardrail.InputGuardrailResult;
+
+import java.util.Set;
+
+/**
+ * 安全检测输入护轨
+ *
+ * @author huangge1199
+ * @since 2025/7/14 11:19:01
+ */
+public class SafeInputGuardrail implements InputGuardrail {
+
+    private static final Set<String> sensitiveWords = Set.of("kill", "evil");
+
+    /**
+     * 检测用户输入是否安全
+     */
+    @Override
+    public InputGuardrailResult validate(UserMessage userMessage) {
+        // 获取用户输入并转换为小写以确保大小写不敏感
+        String inputText = userMessage.singleText().toLowerCase();
+        // 使用正则表达式分割输入文本为单词
+        String[] words = inputText.split("\\W+");
+        // 遍历所有单词，检查是否存在敏感词
+        for (String word : words) {
+            if (sensitiveWords.contains(word)) {
+                return fatal("Sensitive word detected: " + word);
+            }
+        }
+        return success();
+    }
+}
+
diff --git a/src/main/java/com/huangge1199/ai/service/LangChainService.java b/src/main/java/com/huangge1199/ai/service/LangChainService.java
index 0e1728d..b74118d 100644
--- a/src/main/java/com/huangge1199/ai/service/LangChainService.java
+++ b/src/main/java/com/huangge1199/ai/service/LangChainService.java
@@ -1,7 +1,9 @@
 package com.huangge1199.ai.service;
 
+import com.huangge1199.ai.config.SafeInputGuardrail;
 import dev.langchain4j.service.Result;
 import dev.langchain4j.service.SystemMessage;
+import dev.langchain4j.service.guardrail.InputGuardrails;
 
 import java.util.List;
 
@@ -11,6 +13,7 @@ import java.util.List;
  * @author huangge1199
  * @since 2025/7/12 10:25:27
  */
+@InputGuardrails({SafeInputGuardrail.class})
 public interface LangChainService {
 
     @SystemMessage(fromResource = "system-prompt.txt")