diff --git a/src/main/java/org/dromara/easyai/function/Tanh.java b/src/main/java/org/dromara/easyai/function/Tanh.java
new file mode 100644
index 0000000..ca63512
--- /dev/null
+++ b/src/main/java/org/dromara/easyai/function/Tanh.java
@@ -0,0 +1,20 @@
+package org.dromara.easyai.function;
+
+
+import org.dromara.easyai.i.ActiveFunction;
+
+public class Tanh implements ActiveFunction {
+    @Override
+    public float function(float x) {
+        float x1 = (float)Math.exp(x);
+        float x2 = (float)Math.exp(-x);
+        float son = x1 - x2;// ArithUtil.sub(x1, x2);
+        float mother = x1 + x2;// ArithUtil.add(x1, x2);
+        return son / mother;//ArithUtil.div(son, mother);
+    }
+
+    @Override
+    public float functionG(float out) {
+        return 1 - (float)Math.pow(out, 2);
+    }
+}