Children with autism have weaker balance performance than their healthy counterparts. The ability to maintain balance is particularly important because it is a prerequisite for performing other movement activities. This research was conducted in order to determine the effect of square stepping exercises with a light screen on the static and dynamic balance of children with autism. In this semi-experimental study, 20 children with autism, aged 6 to 12 years, were randomly divided into two groups of ten (exercise group with light screen and control group). The exercise group with a light screen and the control group with a simple screen received square stepping exercises for 12 weeks in 4 sessions of 45 minutes per week under the supervision of their trainers. To evaluate static and dynamic balance, the foot scan device and the heel-to-toe walking test were used, respectively. The research data was analyzed by covariance test at a significant level (p<0.05). With the pre-test control, a significant difference was observed between the experimental group and the control regarding the static balance state (Displacement pressure of Center (p = 0.003) and Excursion Velocity of center of pressure (p = 0.007). Also, in the case of dynamic balance, a significant difference was found between the average groups (p=0.001). These results can provide a good basis for using this exercises method to increase the balance and motor functions of children with autism.