The patient should be closely observed during ascitic fluid puncture, and the fluid release should not be too fast or too much, and should not exceed 1000 mL for the first time. if the patient is found to have dizziness, nausea, palpitations, shortness of breath, increased pulse rate and pallor during the puncture, the operation should be stopped immediately and appropriate treatment should be done, such as supplemental blood volume and bed rest. If the fluid is bloody, the fluid should be stopped after the specimen is taken. Patients with cirrhosis should not have more than 3000mL of fluid released at a time to prevent hepatic encephalopathy and electrolyte disorders. If the peritoneal discharge is not smooth, the puncture needle can be moved or changed slightly. If the puncture is for a small amount of fluid, it can be positioned with the help of ultrasound before puncture, and in patients with a large amount of peritoneal fluid, in order to prevent possible leakage during puncture, care should be taken not to let the skin and the wall layer of the peritoneum lie in the same straight line during puncture.