PSAM card two-stage online authorization authentication method, device and system

The invention provides a PSAM card two-stage online authorization authentication method, device and system. The method comprises the following steps: judging whether a PSAM card is in a sign-in grey list issued by a management end according to a PSAM card authentication request sent by a lane charging end; if not, inquiring the number of remaining authorizable times from the counter; when the number of remaining authorizable times is not lower than a preset value, generating authentication key data for the PSAM card and returning the authentication key data to the lane charging end so that the lane charging end uses the authentication key data to authenticate the PSAM card; and receiving authentication success information returned by the lane charging end, and subtracting 1 from the number of authorizable times of the PSAM card in the counter. According to the invention, a plurality of response paths are expanded for the PSAM authorization request sent by the lane charging system, the authorization request se