The rate of postoperative metastasis of bladder tumors is usually related to the depth of infiltration of the tumor, the degree of malignancy, etc., and also has some individual differences, which cannot be generalized. If the tumor is not infiltrated and the tumor is completely resected, metastasis usually does not occur. If the tumor only infiltrates the bladder mucosa, the probability of metastasis is 10%~15%. If the tumor infiltrates into the muscular layer, the metastatic rate is 15%~35%. If the depth of infiltration reaches the deep muscle layer of the bladder, invades organs outside the bladder, organs around the bladder, etc., the probability of metastasis may reach about 50%. In addition, the rate of postoperative metastasis of bladder tumors is related to the degree of malignancy of the tumor. Generally the more malignant the bladder tumor, the higher the postoperative metastasis rate. For example, the likelihood of postoperative metastasis of papillary bladder tumor is low, and the likelihood of postoperative metastasis of bladder adenocarcinoma is high. Therefore, the postoperative metastasis rate of bladder tumors needs to be combined with many factors. It is recommended that patients should have regular postoperative checkups and go to regular hospitals in time if any discomfort occurs.