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Objective : To investigate the effect of occlusal splints on masticatory muscles electromyography of temporomandibular disorders (TMD). Method : Forty patients with temporomandibular disorders admitted to Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine from March 2016 to March 2019 were enrolled in the study. They were divided into two groups according to the different points of wearing the occlusal splints. Patients in the group A (18 cases) were occluded. The splint and the lower anterior teeth were in point-like uniform contact; In the group B (22 cases), the occlusal splint was in point contact with the function of the right dentition, and the bilateral anterior tibiofibular fascia was compared between the two groups before and after wearing temporal anterior (TA), masseter muscle (MM) changes in masticatory muscles electromyography. Result : There was no significant difference in TA and MM between the two groups before the wearing of the occlusal splint (P>0.05). After one month of wearing the splint, the TA and MM indexes of the two groups were significantly decreased, and the TA of the group B was significantly higher than that of the group B, MM was significantly lower than group A (P<0.05). The TA and MM values of the two groups were significantly increased after one month of wearing the splint (P<0.05), and the TA and MM values of the group A were slightly higher than those of the group B, but the comparison was not statistically significant (P>0.05). The VAS scores of the two groups were significantly decreased after wearing the splint, and the score of group A was significantly lower than that of group B (P<0.05). Conclusion : The treatment of TMD with a occlusal splint and a point-like uniform contact between the lower anterior teeth and the lingual side splint can improve the masticatory muscles function and relieve pain symptoms. [ABSTRACT FROM AUTHOR]