Objective To explore the effect of occlusal pad push spring removable appliance on masticatory function in children with anterior crossbite in deciduous dentition. Methods A total of 60 children with anterior crossbite in deciduous dentition admitted to Qiqihar First Hospital from March 2023 to March 2024 were selected, and they were divided into the control group and the observation group according to the different orthodontics treatment method, with 30 children in each group. The control group was treated with anterior bite plane appliance, and the observation group was treated with occlusal pad push spring removable appliance. The changes in jaw and permanent tooth germ position, temporomandibular joint changes and masticatory function were compared between the two groups. Results After treatment, the SNA, ANB and SN-Pg of the observation group were higher than those of the control group, and the SNB was lower than that of the control group (P <0.05). After treatment, the anterior joint space of the observation group was higher than that of the control group, and the posterior joint space was lower than that of the control group (P <0.05). After treatment, the masticatory function of the observation group was better than that of the control group (P <0.05). Conclusion The occlusal pad push spring removable appliance shows good clinical value in the treatment of children with anterior crossbite in deciduous dentition. It can effectively guide the normal development of jaw and permanent tooth germ positions, improve the structural relationship of the temporomandibular joint, and enhance the masticatory function of children.