Credit card quota sharing has many advantages, which can facilitate cardholders to manage their own cards. All the card usage records are reflected in one bill, including supplementary cards, so that cardholders can see the amount at a glance. In addition, sharing credit lines can also help you better accumulate credit records. Once the credit limit is increased, all cards can enjoy not calling repeatedly to increase the credit limit. With the shared credit line, you can also prevent the abuse of credit line because you have multiple cards, and help cardholders develop good financial management and card use habits. But the most important thing is not to forget the repayment date, otherwise all the benefits will be lost.