diff --git a/src/main/java/com/xydl/cac/util/IcdXmlUtil.java b/src/main/java/com/xydl/cac/util/IcdXmlUtil.java
index c59961a..5da9067 100644
--- a/src/main/java/com/xydl/cac/util/IcdXmlUtil.java
+++ b/src/main/java/com/xydl/cac/util/IcdXmlUtil.java
@@ -98,6 +98,13 @@ public class IcdXmlUtil {
             String lnInst = fcdaNode.get("lnInst").asText();
             String doName = fcdaNode.get("doName").asText();
             String fc = fcdaNode.get("fc").asText();
+            JsonNode preNode = fcdaNode.get("prefix");
+            if (preNode != null) {
+                String prefix = preNode.asText();
+                if (StringUtils.isNotBlank(prefix)) {
+                    lnClass = prefix + lnClass;
+                }
+            }
 
             JsonNode lnNode = mapLN.get(lnClass + lnInst);
             String lnType = lnNode.get("lnType").asText();
@@ -154,6 +161,13 @@ public class IcdXmlUtil {
         for (JsonNode node : list) {
             String lnClass = node.get("lnClass").asText();
             String inst = node.get("inst").asText();
+            JsonNode preNode = node.get("prefix");
+            if (preNode != null) {
+                String prefix = preNode.asText();
+                if (StringUtils.isNotBlank(prefix)) {
+                    lnClass = prefix + lnClass;
+                }
+            }
             map.put(lnClass + inst, node);
         }
         return map;