The criminalization of self-laundering,as a practical change in the revision of the Criminal Law,not only a-ligns with the policy stance of strictly punishing money laundering behavior,but also brings practical difficulties to the stand-ardized judgment of joint criminal identification of money laundering crimes.The practical determination of joint crimes after the criminalization of money laundering should establish the elements for the establishment of localized crimes,and make a comprehensive judgment of form and substance in combination with the dual differentiation system of criminal participation.The joint behavior of self-laundering and other money laundering is difficult to distinguish between principal and accomplices based on subjective intention or objective behavior,and the characteristics of mutual cooperation and joint contribution are also difficult to distinguish the status of branching and matching.It is necessary to make individual judgments based on causal forces.The determination of joint crimes in money laundering cannot be generalized or arbitrary.The existence of joint illegal acts should be the central axis,and third-party involvement in money laundering should be reviewed and screened.Whether the act of third-party involvement in premeditated collusion is criminally punishable depends on the specific content of the col-lusion to determine the responsibility and the appropriateness of the evaluation of the crime and punishment.Collusive behavior solely targeting money laundering should not be penetrated into upstream crimes and punished together.