Method and system for verifying trader identity on ATM (Automatic Teller Machine)

The invention belongs to the technical field of financial transaction security and relates to a method and system for verifying a trader identity on an ATM (Automatic Teller Machine). The method comprises the steps of: acquiring a withdrawing password of a bank card by using a mobile terminal, sending the withdrawing password to a server in a short message manner, sending an authentication code after the withdrawing password is verified to have authenticity by the server, sending the authentication code input by a user to the server for verification by the ATM, determining whether the authentication code input by the user is identical to the authentication code sent by the server to the mobile terminal or not, if so, judging that the authentication code is correct and verifying the information of the bank card inserted by the user at the same time, verifying whether the information of the bank card is identical to the information of the bank card bound to an SIM (Subscriber Identity Module) card of the mobile terminal or not, if so, judging the identity of a withdrawer to be legal, and allowing the withdrawer to enter transaction operation of a next step. The method and the system disclosed by the invention have the advantages of high security, simple method, simplicity for user operation, and wide applicable range.