Objective To analyse facial recognition abilities and features of students with autism spectrum disorder under different intensity levels.Method A total of 15 children with high-functioning autism spectrum disorders and 15 biological age matched normal children were selected,to find face expression recognition characteristics of autism and effects of expression intensity.Result 1)The abilities of facial expression recagnition in children with autism spectrum disorder is significantly lower than that of normal children was score of identifying positive emotion was better than that of negative emotion;2)Medium level emotion recognition was faster than the low and high varying intensity,but the accuracy of high level of emotion recognition was better than that of low and medium level of emotion recognition.Conclusions 1)Autism have defects in facial expression recognition.2)Expression intensity affects facial expression recognition in ASD children Greater intensity of expression,better performance will make expression coding more effective,so that expression is more likely to be discerned for autism.