Bank card payment system based on market trace platform and payment settlement method

The invention discloses a bank card payment system based on a market trace platform and a payment settlement method. The bank card payment system comprises an external connection unit, a transaction service unit, a security policy deployment unit, an electronic scale information collection unit and a trace information service unit. A bank business system is connected with the transaction service unit through the external connection unit, and the transaction service unit is connected with the trace information service unit through the security policy deployment unit A. The payment settlement method comprises the steps of card swiping, payment information exchange between the trace platform and a bank, card legality and authenticity verification of the bank, card-card transfer and the like. On the basis of the market trace platform, a financial integrated circuit (IC) card containing trace information and an electronic scale supporting card reading are introduced to seamlessly connecting the market trace platfo