In the past few decades， the steady increase of clinical and neuroimaging data collected in large-scale observational studies has enabled people to better understand the specificity of social eye contact among autism spectrum disorder（ ASD） patients and explore the specific cognitive process of visual processing. In addition， these large-scale data support the development and wider application of auxiliary diagnosis， curative effect assessment and personalized treatment facilities for ASD， which is of great help to improve the expected clinical progress and prognosis of ASD， and provide an opportunity for the development of personalized precision therapy， which is also an important direction in the future. This paper will review the application of eye tracking technique in diagnosis and treatment of ASD.