1.1 General data Twenty cases in this group. There were 14 male cases and 6 female cases; age 24, 71 years old, average 47.4 years old. All of them had meatus, with blood clots in 7 cases; among them, 19 cases were primary and 1 case was recurrent. There were 18 cases of single tumor and 2 cases of multiple tumors, the most number of which was 3. The tumor diameters were 0.4 and 3.5 cm, and all patients with lateral wall tumors were selected. All cases were examined by cystoscopy and pathological biopsy before surgery, among which, 18 cases were metastatic cell carcinoma, with 10 cases of grade I, 7 cases of grade II and 1 case of grade III pathology; 2 cases were papilloma. Preoperative urological ultrasound, CT, and KUB+IVP examinations were routinely performed. The clinical stage was ≤ B2. 1.2 Surgical method Continuous epidural anesthesia was taken in the lithotomy position. The American Shun Kang brand F25.6 bladder continuous irrigation vaporization electroscope was applied. 5% mannitol was applied as the irrigation solution. The bladder was kept semi-filled during the operation. When the tumor is close to the root, the holmium laser (max. power 60w) is used to remove the vapor electrosurgery ring and the laser fiber is inserted through the operation orifice. The laser fiber is inserted through this orifice, and the tip is resected up to the muscular layer under the guidance of the indicated light. For multiple cases, except for the lateral wall, the vaporization electrode was used for resection and hemostasis. No blood transfusion, no closed nerve reflex and no bladder perforation occurred during the operation, and a three-lumen urinary catheter was placed after the operation and some bladder irrigation was performed. The cystoscopy was repeated every 3 months in the first year and every 6 months in the second year after surgery. 2 cases of recurrence were reported. The first choice for the treatment of superficial bladder tumor is transurethral bladder tumor electrosurgery. This procedure has the characteristics of no incision, can be repeated, low impact on patients and fast postoperative recovery. The clinical efficacy of this procedure has been widely recognized at home and abroad, and the indications are superficial bladder tumors within T2 stage. [3] In recent years, transurethral electrical resection of bladder tumors (TVBT) has been adopted clinically to reduce the risk of electrodesiccation syndrome, but the resection is still prone to closed nerve reflex leading to bladder perforation, especially for tumors in the lateral wall. Even with preoperative closed nerve closure, there is a certain incidence. Holmium laser resection of transurethral bladder tumor has no electric field effect, does not stimulate the foramen ovale nerve and has shallow penetration depth, so bladder perforation is not likely to occur. However, it is much less rapid than vapor electrosurgery in removing larger tumors. We have learned that the combined use of vaporization electrosurgery and holmium laser has the advantages of high efficiency, safety, few complications and fast recovery in the treatment of superficial bladder tumors, especially lateral wall tumors, and is worth further promotion.