Steps of intraperitoneal chemotherapy drug infusion: 1. It is necessary to clarify the presence of metastatic cancer in the abdominal cavity, and the main malignant tumors that are prone to metastatic cancer in the abdominal cavity are stomach cancer, ovarian cancer, pancreatic cancer, etc. 2. It is necessary to fully drain the ascites in the abdominal cavity, including the retention of drainage tubes, and try to make the abdominal drainage fluid drain clean after drainage. 3. The chemotherapeutic drugs can be infused into the abdominal cavity through a tube and retained for 24 hours before being drained out of the body through drainage fluid or drainage tubes. Intraperitoneal perfusion chemotherapy allows chemotherapeutic drugs to directly contact cancer cells in the abdominal cavity, thus improving the effect of local perfusion and reducing the generation of ascites, which is helpful for the treatment of gastric cancer and ovarian cancer.