Insulin pump is composed of a microcomputer-controlled electronic information board, a micro motor-driven screw rod, an insulin reservoir, a battery, and an infusion catheter system. Since insulin pump can imitate the way of human insulin secretion in physiological state and can control blood sugar effectively and safely, it has been accepted by more and more patients. However, in the daily operation, there are some small details that are often ignored by some patients, thus leading to big mistakes. Some of the problems I encountered in my work are divided as follows to draw the attention of friends who are using the pump. 1. Before going to bed, please check the medication reservoir to make sure there is enough insulin in it to be used until the next morning. Because some people sleep more “dead” at night, once the pump alarm due to insufficient insulin may not be heard. (1) Insulin should be taken out of the refrigerator 3-4 hours in advance and used after its temperature has risen to room temperature. (2) To avoid accidental insulin infusion, be sure to disconnect the infusion device from the puncture site before replacing the new reservoir; (3) Before restarting insulin infusion, be sure to remove all air from the reservoir and the infusion device. (3) Before restarting insulin infusion, make sure to drain all the air from the drug reservoir and infusion device, otherwise the air bubbles in the device will slow down or stop insulin infusion; (4) It is better to test the blood glucose 1-2 hours after replacing the drug reservoir to determine whether the device is operating normally. (1) Do not change the infusion site before going to bed, because if problems occur at this time, it is likely that they will not be detected in time; (2) Avoid hard knots, scars or broken skin at the infusion site, because insulin infusion at these sites may result in impaired insulin absorption; (3) Change the infusion site if there are symptoms such as redness and itching of the skin at the infusion site. (4) Care should be taken to avoid the whole infusion device being caught or entangled by clothes, etc. during the wearing process so as not to affect the correct infusion of insulin.