1. A bank card is a credit card (debit card). If it is frozen, it may be that your credit card has abnormal transactions, such as malicious cashing, forged information, and continuous password errors. The bank card may be frozen by the bank. Second, if you overdraw your bank card, the bank will make an overdraft share for you according to your actual repayment ability. When your overdraft exceeds your share, the bank will freeze your bank card immediately. Your bank card is a debit card. If it is frozen, it will be frozen in the wrong account, that is to say, the bank mistakenly gave more money to your account during the transaction, so the bank may freeze the part that was given to you. The first is the judicial freeze. According to the relevant provisions of the law, the judicial organ may apply to the bank for freezing your bank card because of the need of handling a case. At the same time, customs, tax authorities and other departments also have the right to freeze. 4. No matter what kind of bank card you enter, if you enter it incorrectly for three consecutive times, the banking system will automatically lock your bank card password, which is similar to freezing, but not freezing. It will be released automatically after 24 hours. If you don't apply for a new card when your bank card expires, the bank will freeze your expired bank card after it expires. 6. If your bank card reports the loss several times in a row, it will be frozen because the bank thinks it is suspected of malicious loss reporting. If the bank card is to be unfrozen after being frozen, the unfrozen time or procedure will be different for different reasons. Some bank cards may never be thawed. You'd better call or go to the bank for advice in person.