Autism or Autism Spectrum Disorder (ASD) is public health in developing countries those need to be treated and managed in early ages. The ASD children are managed with behavioural modification, occupational therapy and sensory integration. In this research evaluated the whether the integration of sensory integration with the behaviour and occupational therapy. The sensory integration is presented through the computer assisted information model. Through the computer-assisted model the stimming activities can be managed like lateral viewing, making some noises, hand flapping and so on. With descriptive functional performance analysis treatment can be managed with sensory integration based on behavioural and occupational therapy. The descriptive analysis is performed for the empirical-based research design model for the students in STD-II/IV. The examination is conducted for the children with the evaluation of student's performance for the academic activities. The data for analysis is collected from the special school students in Riyadh in Saudi Arabia. Through sensory integration therapy with behavioural and occupational therapy the observation is performed for the pre and post-testing in the groups. The statistical data analysis is performed through SPSS. The ASD children performance in subject wise are examined for mathematics and EVS. The statistical analysis Adhwaa Ali Alahmari Integrating behavioural and occupational therapy using a computer visual system to reduce sensory stimulation in children with autism spectrum disorder expressed that through sensory integration behaviour and occupational therapy with computer-assisted model provides significant performance in the ASD students' performance. Through computer-assisted sensory model integrated with behaviour and occupational model increases the speech and understanding of ASD children are significantly improved. It is evident that computerassisted sensory integration therapy model is effective for the behavioural modification with occupational therapy for the students with ASD.