diff --git a/src/Contract.php b/src/Contract.php
index 87ad1fc..530406c 100644
--- a/src/Contract.php
+++ b/src/Contract.php
@@ -32,6 +32,7 @@ use Web3\Validators\StringValidator;
 use Web3\Validators\TagValidator;
 use Web3\Validators\QuantityValidator;
 use Web3\Formatters\AddressFormatter;
+use Web3\Contracts\Types\Tuple;
 
 class Contract
 {
@@ -162,6 +163,7 @@ class Contract
             'int' => new Integer,
             'string' => new Str,
             'uint' => new Uinteger,
+            'tuple' => new Tuple,
         ]);
     }
 
diff --git a/src/Contracts/Ethabi.php b/src/Contracts/Ethabi.php
index 694a563..aced751 100644
--- a/src/Contracts/Ethabi.php
+++ b/src/Contracts/Ethabi.php
@@ -238,7 +238,11 @@ class Ethabi
             if (isset($outputTypes['outputs'][$i]['name']) && empty($outputTypes['outputs'][$i]['name']) === false) {
                 $result[$outputTypes['outputs'][$i]['name']] = $solidityTypes[$i]->decode($param, $offsets[$i], $types[$i]);
             } else {
-                $result[$i] = $solidityTypes[$i]->decode($param, $offsets[$i], $types[$i]);
+                if($types[$i] == "tuple"){
+                    $result[$i] = $solidityTypes[$i]->decodeTuple($outputTypes['outputs'][$i],$param);
+                }else{
+                    $result[$i] = $solidityTypes[$i]->decode($param, $offsets[$i], $types[$i]);
+                }
             }
         }
 
diff --git a/src/Contracts/SolidityType.php b/src/Contracts/SolidityType.php
index 5adf572..e5ebd45 100644
--- a/src/Contracts/SolidityType.php
+++ b/src/Contracts/SolidityType.php
@@ -13,9 +13,21 @@ namespace Web3\Contracts;
 
 use Web3\Utils;
 use Web3\Formatters\IntegerFormatter;
+use InvalidArgumentException;
+use Web3\Contracts\Types\Address;
+use Web3\Contracts\Types\Boolean;
+use Web3\Contracts\Types\Bytes;
+use Web3\Contracts\Types\DynamicBytes;
+use Web3\Contracts\Types\Integer;
+use Web3\Contracts\Types\Str;
+use Web3\Contracts\Types\Uinteger;
+use Web3\Contracts\Types\Tuple;
+
 
 class SolidityType
 {
+    private array $types = [];
+
     /**
      * construct
      * 
@@ -23,6 +35,27 @@ class SolidityType
      */
     // public function  __construct() {}
 
+    /**
+     * set types
+     */
+    private function  setTypes() 
+    {
+        if(!empty($this->types)){
+            return $this->types;
+        }
+        $this->types = [
+            'address' => new Address,
+            'bool' => new Boolean,
+            'bytes' => new Bytes,
+            'dynamicBytes' => new DynamicBytes,
+            'int' => new Integer,
+            'string' => new Str,
+            'uint' => new Uinteger,
+            'tuple' => new Tuple,
+        ];
+        return $this->types;
+    }
+
     /**
      * get
      * 
@@ -270,4 +303,81 @@ class SolidityType
 
         return $this->outputFormat($param, $name);
     }
+
+    /**
+     * decode struct data
+     * 
+     * @author abaowu <abaowu@gmail.com>
+     * @param array $type tuple struct
+     * @param mix $value tuple value
+     * @return array
+     */
+    public function decodeTuple($type, $value) 
+    {
+        $outputTypes = $type["components"];
+        $typesLength = count($outputTypes);
+        $solidityTypes = $this->getSolidityTypes($outputTypes);
+        $offsets = array_fill(0, $typesLength, 0);
+        
+        for ($i=0; $i<$typesLength; $i++) {
+            $offsets[$i] = $solidityTypes[$i]->staticPartLength($outputTypes[$i]['type']);
+        }
+        for ($i=1; $i<$typesLength; $i++) {
+            $offsets[$i] += $offsets[$i - 1];
+        }
+        for ($i=0; $i<$typesLength; $i++) {
+            $offsets[$i] -= $solidityTypes[$i]->staticPartLength($outputTypes[$i]['type']);
+        }
+        $result = [];
+        $param = mb_strtolower(Utils::stripZero($value));
+        
+        for ($i=0; $i<$typesLength; $i++) {
+            if (isset($outputTypes[$i]['name']) && empty($outputTypes[$i]['name']) === false) {
+                $result[$outputTypes[$i]['name']] = $solidityTypes[$i]->decode($param, $offsets[$i], $outputTypes[$i]['type']);
+            } else {
+                $result[$i] = $solidityTypes[$i]->decode($param, $offsets[$i], $outputTypes[$i]['type']);
+            }
+        }
+
+        return $result;
+    
+    }
+
+
+    /**
+     * getSolidityTypes
+     * 
+     * @param array $types
+     * @return array
+     */
+    protected function getSolidityTypes($types)
+    {
+        if (!is_array($types)) {
+            throw new InvalidArgumentException('Types must be array');
+        }
+        $solidityTypes = array_fill(0, count($types), 0);
+        $this->setTypes();
+
+        foreach ($types as $key => $type) {
+            $match = [];
+            $type = $type['type'];
+            if (preg_match('/^([a-zA-Z]+)/', $type, $match) === 1) {
+                if (isset($this->types[$match[0]])) {
+                    $className = $this->types[$match[0]];
+
+                    if (call_user_func([$this->types[$match[0]], 'isType'], $type) === false) {
+                        // check dynamic bytes
+                        if ($match[0] === 'bytes') {
+                            $className = $this->types['dynamicBytes'];
+                        } else {
+                            throw new InvalidArgumentException('Unsupport solidity parameter type: ' . $type);
+                        }
+                    }
+                    $solidityTypes[$key] = $className;
+                }
+            }
+        }
+        return $solidityTypes;
+    }
+
 }
\ No newline at end of file
diff --git a/src/Contracts/Types/Tuple.php b/src/Contracts/Types/Tuple.php
new file mode 100644
index 0000000..de2e77f
--- /dev/null
+++ b/src/Contracts/Types/Tuple.php
@@ -0,0 +1,86 @@
+<?php
+
+/**
+ * This file is part of web3.php package.
+ * 
+ * (c) abaowu <abaowu@gmail.com>
+ * 
+ * @author abaowu <abaowu@gmail.com>
+ * @license MIT
+ */
+
+namespace Web3\Contracts\Types;
+
+use Web3\Contracts\SolidityType;
+use Web3\Contracts\Types\IType;
+
+class Tuple extends SolidityType implements IType
+{
+    /**
+     * construct
+     * 
+     * @return void
+     */
+    public function __construct()
+    {
+        //
+    }
+
+    /**
+     * isType
+     * 
+     * @param string $name
+     * @return bool
+     */
+    public function isType($name)
+    {
+        return (preg_match('/^tuple(\[([0-9]*)\])*$/', $name) === 1);
+    }
+
+    /**
+     * isDynamicType
+     * 
+     * @return bool
+     */
+    public function isDynamicType()
+    {
+        return true;
+    }
+
+    /**
+     * inputFormat
+     * to do: iban
+     * 
+     * @param mixed $value
+     * @param string $name
+     * @return string
+     */
+    public function inputFormat($value, $name)
+    {
+        // $value = (string) $value;
+
+        // if (Utils::isAddress($value)) {
+        //     $value = mb_strtolower($value);
+
+        //     if (Utils::isZeroPrefixed($value)) {
+        //         $value = Utils::stripZero($value);
+        //     }
+        // }
+        // $value = IntegerFormatter::format($value);
+
+        return $value;
+    }
+
+    /**
+     * outputFormat
+     * 
+     * @param mixed $value
+     * @param string $name
+     * @return string
+     */
+    public function outputFormat($value, $name)
+    {
+        // return '0x' . mb_substr($value, 24, 40);
+        return $value;
+    }
+}
\ No newline at end of file