【Abstract】 Objective To observe the efficacy of locking plate in the treatment of shoulder dislocation and proximal humeral fractures. Methods 90 shoulder dislocation patients complicated with proximal humeral fracture treated from June 2011 to June 2017 in our hospital were selected. The subjects were randomly divided into study group (60 cases) and control group (30 cases). The study group adopted the locking plate. The control group adopted the trifoliumshaped plate. After surgery, Neer score, the incidence rate of complications and postoperative good rate were observed. Results The Neer score for study group were increased. The range of motion and pain scores for study group were significantly higher than that of control group (P＜005). The anatomic locations and function scores for two groups were not significantly different (P＞005). The Neer score for study group was significantly higher than that of control group (P＜005). The incidence rate of complications for study group was lower than that of control group. After treatment, the study group just had 4 unsatisfactory cases. The good rate for study group was significantly higher than that of control group (P＜005).Conclusion Compared with the trifoliumshaped plate, the locking plate has a better effect in shoulder dislocation patients complicated with proximal humeral fracture, can reduce the incidence rate of postoperative complications and improve Neer score.