diff --git a/src/main/java/org/dromara/easyai/i/CustomEncoding.java b/src/main/java/org/dromara/easyai/i/CustomEncoding.java
new file mode 100644
index 0000000..edffad5
--- /dev/null
+++ b/src/main/java/org/dromara/easyai/i/CustomEncoding.java
@@ -0,0 +1,12 @@
+package org.dromara.easyai.i;
+
+import java.util.Map;
+
+/**
+ * @author lidapeng
+ * @time 2025/4/9 09:55
+ * @des 自定义编码模块
+ */
+public interface CustomEncoding {
+    void backError(Map<Integer, Float> wg, int id) throws Exception;//返回最后一层误差
+}