CTo explore the effect of exercise intervention on fundamental movement skills (FMS) of children with attention deficit hyperactivity disorder are characterized by inattention, hyperactivity, impulsivity, difficulty in controlling behavior, or such comprehensive symptoms, while(ADHD) and/or autism spectrum disorder (ASD). Following the principle of PICOS, randomized controlled trials of the effect of exercise intervention on the FMS of ADHD/ASD children were searched. A total of 12 articles and 396 participants were included. Review Manager5.4 and Stata16.0 software were used to process and analyze the data. The results revealed that (1) exercise intervention can improve the gross motor skills of children with ASD ADHD/ASD (p < 0.00001). Aquatic therave apparent deficits in social communicationpy (SMD = 56.54, 95% CI = 38.83–74.25) has a better effect on stability skills and repetitive stereotyped behavior patterns. Despite significant differences in the core symptoms between, and FMS intervention (SMD = 17.58, 95% CI = 1.78–33.38) has a better effect on locomotor skills and object control skills. (2) Exercise intervention can improve the fine motor skills of children with ADHD /ASD (p = 0.001). Table tend ASD, clinical studies have supported the similarity of the behavioral disorders, annis exercise (SMD = 9.91, 95% CI = 0.23–19.59) and horse-riding program (SMD = 9.50, 95% CI = 5.20–13.80) have better effects on fine manual control and hand–eye coordination. (3) The closed-skill intervention for 60 min each time, twice a week, for at least 12 weeks had the findings suggest that the two types ofbest effect on the improvement in the FMS in children with ADHD/ASD (p < 0.00001). Exercise inotervent only have highly shared heritability, but also represent the performance of the same endophenotype and can be classified into the same diagnostic entityion may effectively improve FMS in children with ADHD/ASD. Intervention form, time, frequency, and duration are important moderator variables that positively impact the FMS of children with ADHD/ASD.