OBJECTIVE: Family intervention is a crucial component of treatment for children with autism spectrum disorder (ASD), yet the impact of parent-mediated family-intensive behavioral intervention on the language abilities of children with ASD has been barely studied. The purpose is to investigate the effectiveness of the Verbal Behavior Milestones Assessment and Placement Program (VB-MAPP)-based family-intensive behavioral intervention in enhancing the language abilities of children with ASD. This study provides insights to help ASD children better cope with daily life. METHODS: From September 2020 to September 2022, a total of 85 clinically diagnosed children with ASD and 30 age- and sex-matched children without ASD were recruited. Applied Behavior Analysis (ABA) and VB-MAPP were used for evaluating and determining individualized intervention programs for children with ASD. The intervention lasted 6 months. RESULTS: There were no significant differences in demographic characteristics between children with ASD and children without ASD (all CONCLUSIONS: Family-intensive behavioral intervention significantly improved the skills of children with ASD, as assessed by the VB-MAPP. These findings emphasize the importance of family intervention and provide further support for proposing a family intervention program for children with ASD that is suitable for China's national conditions.