1、int类型、address、string进行打包：

import (
	"encoding/hex"
	"github.com/ethereum/go-ethereum/accounts/abi"
)
...
addressTy, _ := abi.NewType("address", "string", []abi.ArgumentMarshaling{})
bytesTy, _ := abi.NewType("bytes", "string", nil)
uint256Ty, _ := abi.NewType("uint256", "uint64", []abi.ArgumentMarshaling{})

	args := abi.Arguments{
		{Type: addressTy},
		{Type: bytesTy},
		{Type: uint256Ty}
	}
//尤其注意这里，当string转bytes的时候一定要用hex.DecodeString进行16进制转bytes
	_params2, _ := hex.DecodeString(params2)
	packed, err := args.Pack(
		common.HexToAddress(params1),
		_params2,
		big.NewInt(_params3)
	)
...
argPacked := hexutil.Encode(packed)

2、结构体数组的打包；

import (
	"encoding/hex"
	"github.com/ethereum/go-ethereum/accounts/abi"
)
...

type Transaction struct {
	To    common.Address `json:"to"`
	Value *big.Int       `json:"value"`
	Data  []byte         `json:"data"`
}
...

//golang数组的打包，在生成新类型的时候，中括号"[]"应该在类型名的后边
	structTy, _ := abi.NewType("tuple[]", "struct ty", []abi.ArgumentMarshaling{
		{Name: "params1", Type: "address"},
		{Name: "params2", Type: "uint256"},
		{Name: "params3", Type: "bytes"},
	})

	args := abi.Arguments{
		{Type: structTy},
	}

        _params3, _ := hex.DecodeString(params3)
        transactions := []Transaction{
          {
            common.HexToAddress(params1), 
            big.NewInt(params2), 
            params3
          }
        }

	packed, err := args.Pack(
		transactions,
	)

	argPacked := hexutil.Encode(packed)