diff --git a/cat-home/src/main/java/com/dianping/cat/system/config/BaseRuleConfigManager.java b/cat-home/src/main/java/com/dianping/cat/system/config/BaseRuleConfigManager.java
index 2f7b8c72820050ef63d52a9efbc2ece08a0ebfd1..caf8d1e6a2a99fb4bd4b0da771bea94c07053807 100644
--- a/cat-home/src/main/java/com/dianping/cat/system/config/BaseRuleConfigManager.java
+++ b/cat-home/src/main/java/com/dianping/cat/system/config/BaseRuleConfigManager.java
@@ -45,6 +45,7 @@ public abstract class BaseRuleConfigManager {
 			result.addMetricItem(item);
 		}
 		for (Config config : decorateConfigOnRead(rule.getConfigs())) {
+			transformConfig(config);
 			result.addConfig(config);
 		}
 		return result;
@@ -238,6 +239,17 @@ public abstract class BaseRuleConfigManager {
 		return true;
 	}
 
+	private void transformConfig(Config config) {
+		for (Condition condition : config.getConditions()) {
+			for (SubCondition subCondition : condition.getSubConditions()) {
+				if (RuleType.UserDefine.getId().equals(subCondition.getType())) {
+					String userDefineText = subCondition.getText();
+					subCondition.setText(userDefineText.replaceAll("\"", "\\\\\""));
+				}
+			}
+		}
+	}
+
 	public String updateRule(String id, String metricsStr, String configsStr) throws Exception {
 		Rule rule = new Rule(id);
 		List<MetricItem> metricItems = DefaultJsonParser.parseArray(MetricItem.class, metricsStr);
diff --git a/cat-home/src/main/resources/freemaker/rule_configs.ftl b/cat-home/src/main/resources/freemaker/rule_configs.ftl
index b2deb665095e5471665ef966dcdb64855efe230e..cc003c716f60b2f7efa2caf4b2f910a349bf6022 100644
--- a/cat-home/src/main/resources/freemaker/rule_configs.ftl
+++ b/cat-home/src/main/resources/freemaker/rule_configs.ftl
@@ -83,8 +83,11 @@
 </div>
 <div class="subCondition" style="display:none">
     <input name="ruleType" class="ruleType" type="hidden" value="UserDefine"/>
-    <textarea name="value" class="value" rows=20 style="width:700px">
-	    import org.unidal.tuple.Pair;
+    <textarea name="value" class="value" rows=10 style="width:700px">
+    </textarea>
+    <pre>
+    &nbsp;&nbsp;&nbsp;&nbsp;代码示例如下：
+    	&nbsp;&nbsp;&nbsp;&nbsp;import org.unidal.tuple.Pair;
 	    import com.dianping.cat.report.task.alert.RuleType.MonitorRule;
 	    
 	    public class UserDefinedRule implements MonitorRule{
@@ -100,7 +103,9 @@
 	            return null;
 	        }
 	    }
-    </textarea>
+	    
+	 <span class="text-error">编写完代码后，请将代码合并在一行，然后提交到上方的textarea内。代码中不能存在任何换行。</span>
+	</pre>
 </div>
 
 <script>