Objective To explore the clinical application and effect of Trimed hook plate in Danis-Weber A lateral malleolus fractures. Method A retrospective study of the data of 20 patients with Weber A ankle fractures admitted to the Department of Orthopedics of the 80th Army Hospital of the People''s Liberation Army from July 2019 to January 2021. Distal fibula fractures were treated with open reduction and plate internal fixation. According to the different internal fixation used, they were divided into two groups: Trimed group (lateral malleolus fixed with Trimed hook plate) and anatomical plate group (lateral malleolus fixed with anatomical locking plate), with medial malleolus and posterior Patients with ankle fractures are fixed with hollow nails or steel plates. Postoperative observations were made for incision infection, delayed bone union, incision infection, plate loosening and exposure, secondary fracture of fractures, etc., and the postoperative ankle function of the patients was scored according to the AOFAS and Maryland scales. Results Twenty patients were followed up for 12 to 18 months after operation, with an average of 15 months. The AOFAS scores and Maryland scores of the Trimed group were higher than those of the control group at 3 months, 6 months and 12 months after surgery. The operation time of the experimental group was [(19.7± 4.2) min] was significantly shorter than the control group [(28.1±4.9) min], and the difference was statistically significant (P<0.05); VAS (pain at the fracture site) score [5]: no pain (0 points) in 14 cases, 4 cases of mild pain (1-3 points), 2 cases of moderate pain (4-6 points), 0 cases of severe pain (≥7 points); 6 patients in the control group complained of subcutaneous friction of implanted internal fixation after operation Sense; the last follow-up survey of patient satisfaction with treatment, 10 points in 11 cases, 9 points in 6 cases, 8 points in 3 cases, an average of 9.4 points [1]. Conclusion In the surgical treatment of Weber A lateral malleolus fractures, the Trimed hook plate is superior to the anatomical locking plate in terms of short operation time, reduction of free small bones, and postoperative functional recovery. It is worthy of clinical promotion.