After the bladder tumor has been electrocuted, some of them need to undergo secondary resection, the main reasons include postoperative recurrence and malignant tumor cells found at the margin after operation. 1. Postoperative recurrence: it is mainly considered to be related to the incomplete resection of the first cystectomy, after which the tumor reappears in the bladder, it is necessary to perform the second cystectomy after the recovery of the physical condition. 2. Malignant tumor cells found at the cutting edge: malignant tumor cells are found at the cutting edge of the tissue through gross pathological examination after surgery, which suggests that the surgery may not have been cleanly resected, and it is necessary to expand the resection, so the second surgery is performed. After the second cystectomy, the scope of injury increases, we should pay attention to the postoperative recovery, once there is obvious abdominal pain and bleeding, we need to consult a doctor in time for observation and standardized treatment under the guidance of clinicians.