This study investigates the efficiency of a developed training program based on ABLLS-R in reducing stereotypical behaviors among children with autism spectrum disorder (ASD). The experimental approach is employed specifically the single experimental group. The study population consists of 7 children with simple ASD. A measuring stereotypical behaviors was developed which includes two dimensions (motor stereotypical and routine stereotypical behaviors), in addition, a training program based on the ABLLS-R is developed. The findings reveal statistically significant differences between the pre and post treatment of stereotypical behaviors among Jordanian children with ASD in favor of the post-treatment in terms of motor stereotypical behaviors and Routine stereotypical behaviors. The findings indicate that there is an impact and a direct effect on lessen stereotypical motor and routine behaviors among Children with ASD improvement rate (66.6%).