Objective: To investigate the short-term clinical effect of arthroscope-assisted reduction combined with percutaneous patellar needle tension band fixation in the treatment of Rockwood ii-iii patellar fractures, and to compare with the clinical effect of arthroscope-assisted reduction combined with percutaneous patellar needle tension band fixation. Methods: From January 2014 to December 2017 in the second affiliated hospital of fujian medical university orthopaedic surgical treatment of Rockwood II - III 60 patients with patellar fracture as the research object, including 20 cases with arthroscopy assisted reduction patella combined with percutaneous needle tension band fixation surgery (observation group) and 40 cases with traditional open reduction surgery patellar pins tension band internal fixation technology (control group). Operative time, incision length, intraoperative fluoroscopy frequency, fracture healing time, postoperative complications, VAS score and Lysholm score before and after surgery were compared between the two groups. Results: All patients completed the operation successfully. Patients in the two groups were followed up for 12 to 46 months, with an average of 19 to 5 months. No early complications such as wound infection and vascular and nerve injury occurred in the two groups. The operation time of the experimental group was longer than that of the control group, and the difference was statistically significant. The incision length of the experimental group was significantly smaller than that of the control group, and the difference was statistically significant. The number of fluoroscopy in the experimental group was significantly less than that in the control group, and the differences were statistically significant. X-ray reexamination on the first day after surgery indicated that the degree of fracture displacement in both groups was significantly reduced compared with that before surgery, and the difference was statistically significant. Postoperative X-ray examination showed that the fracture reduction in the experimental group was superior to that in the control group. The range of motion of the experimental group 6 months after surgery was better than that of the control group, and the difference was statistically significant. The fracture healing time of the experimental group was significantly shorter than that of the control group, and the differences were statistically significant. There was no statistically significant difference in preoperative VAS scores between the two groups, but there was statistically significant difference in VAS scores between the two groups on the first day after surgery and 6 months after surgery. The Lysholm score of the experimental group was better than that of the control group 6 months after surgery, and the difference was statistically significant. One case of superficial incision infection occurred in the control group and was cured after dressing change. No late complications such as fracture nonunion or internal fixation fracture occurred in the two groups. Conclusion: Arthroscope-assisted reduction combined with percutaneous patellar needle tension band fixation in the treatment of comminuted patellar fracture can be performed under direct vision for fracture reduction, intraoperative joint cavity irrigation is feasible, while repairing other damaged tissues, less surgical trauma, less complications, and it is worth further promotion.