After discharge from the hospital after four cycles of chemotherapy for peritoneal malignant mesothelioma, there are differences in the intervals of review according to the type of chemotherapy, some of them are reviewed every three to four months, and some of them need to be reviewed every one to two months. Peritoneal malignant mesothelioma is a highly malignant tumor disease, if the patient is doing adjuvant chemotherapy, then after four cycles of chemotherapy, the patient should also do a good job of close follow-up to monitor the changes in the condition, generally can be reviewed at intervals of three to four months. If the peritoneal malignant mesothelioma develops into advanced stage and palliative chemotherapy is given, then after four cycles of chemotherapy, it is generally necessary to have a review at an interval of one to two months to evaluate the effect of chemotherapy and to monitor the development of malignant mesothelioma, so as to adjust the treatment plan in time according to the different conditions.