Within 6 months. According to the inquiry on Hualv.com, it was found that the card holder has nothing to do with the case under investigation. The bank card will be automatically unfrozen within 6 months. Therefore, the credit card frozen by the police will be automatically unfrozen within 6 months. . Credit cards refer to various media that record cardholder account information, have bank credit lines and overdraft functions, and provide cardholders with related banking services.