There must be something wrong with your credit card, which may be caused by the following reasons: tx behavior, irregular use of the card, and the limit is running out. Most of these behaviors are considered by banks to set tx. Therefore, the bank downgraded or even directly blocked all kinds of accounts suspected of tx; Credit cards have been idle for a long time. If you apply for a credit card, it has been idle, and some banks may reduce your credit limit. If there is really little demand for credit cards, cancel them as soon as possible to avoid annual fees and other expenses; If the credit card amount is small, the monthly credit card amount is very small, even lower than 10% of the credit amount, the bank will feel that there is little demand for your credit card, and it will also reduce your credit card limit; The phone number that applies for withdrawal is not a binding number, and many card friends apply for withdrawal is not a binding number. If the bank finds out, it may reduce your withdrawal. Long-term yq or yq amount is large, and banks with large long-term yq or yq amount will reduce the amount and then seal the card. Moreover, yq will be recorded in personal credit information, which will affect subsequent loans and card processing. You can also get the credit card analysis report by using the card to find out the reasons for the decrease and effectively sit in the right place. The bank will not reduce the amount for no reason. Please find the right reason and remedy it in time. You can also call the bank's customer service phone for consultation.