A payment processing method comprises: receiving, by a transaction platform, a payment request, wherein the payment request indicates that a protocol payment is performed for a current payment using a third-party payment account; initiating, by the transaction platform, if the third-party payment account is determined as having a risk, a security verification request to a third-party payment service party, to trigger the third-party payment service party to execute a security verification for the current payment to generate a security verification result; obtaining, by the transaction platform, the security verification result from the third-party payment service party; and executing, by the transaction platform, a current payment process for the current payment according to the security verification result. The risk is reduced in the payment process by an identity verification of a third-party payment service to ensure payment security and improve payment experience.