Unified payment access gateway supporting multiple payment channels

The invention discloses a unified payment access gateway supporting multiple payment channels. A unified payment interface receives a payment request comprising a payment mode code and payment verification information sent by a client, and forwards the payment request and the payment verification information to a decryption processing module for decryption; a protocol adaption module extracts the payment mode code and corresponding third-party payment interface information from the decrypted payment request, and makes a query to obtain a payment mode; and a payment processing module re-packages a message, sends the message to a third-party payment platform, receives a processing result message of the third-party payment platform, constructs a feedback message according to an executive mode of the payment mode, and sends the feedback message to the client. According to the gateway, one-point access and multi-output-point payment services are provided for access merchants, so that the client operation is simpli