Objective: To explore the effects and correlation of gross motor intervention on social skills of autistic children. To provide new ideas for rehabilitation intervention of autistic children s social ability. Methods: Recruiting 23 autistic children through WeChat in Nanchang, randomly divided into experimental groups (n=13) and control group (n=10). The experimental group underwent 6 weeks of large muscle exercise intervention, in the control group, Test of Gross Motor Development 3 (TGMD3), Social Responsiveness Scale(SRS) and the Autism Social Skills Scale (ASSS) examined changes in social skills, and analyze the relationship between sports and social ability. Results: TGMD-3 score in the intervention group before intervention was (34.31±9.79) and increased significantly after intervention (59.77±13.92)(t=-15.28, P<0.01). There was no statistical significance before and after experiment in the control group (P>0.05). The scores of SRS and ASSS in the experimental group were (96.77±15.79, 97.31±29.22) before the intervention, and (82.92±15.86, 117.62±24.93) after the intervention, and the differences were statistically significant(t=4.55, -5.61, P<0.01). The difference between the SRS and ASSS scores of the control group before and after experiment was not statistically significant(P>0.05). Both the TGMD-3 score and the object manipulation score were related to the SRS total score (r=-0.49, -0.45) and ASSS total score(r=0.54, 0.51)(P<0.05). Conclusion Gross motor intervention can improve the motor and social skills of children with autism, and there is a positive correlation between motor ability and social skills in children with autism.