Objective To explore the correlation between sensory abnormalities and symptoms， behaviors， and function in children with autism spectrum disorder（ ASD）. Methods A total of 696 children aged 4 to 6 years with ASD who underwent rehabilitation training at the Guangdong Provincial Maternal and Child Health Hospital from March 2022 to March 2024 were selected as study subjects. The children's sensory integration ability， behavior， and functional independence were evaluated using the Sensory Integration Ability Rating Scale for Children， Autism Behavior Checklist（ ABC）， Children Neuropsychological Behavioral Scale， Social Responsiveness Scale（ SRS）， and Wee Functional Independence Measure（ WeeFM）. Based on the total scores of the Sensory Integration Ability Rating Scale for Children， children were divided into mild disorder group（ ≥90 points， n=104）， moderate disorder group（ ＞60 to ＜90 points， n=267）， and severe disorder group （≤ 60 points， n=325）. Differences in scores of ABC， Children Neuropsychological Behavioral Scale， SRS， and WeeFIM among the three groups of pediatric patients were compared. Pearson correlation was used to analyze the correlation between scores on the Sensory Integration Ability Rating Scale for Children and scores on the ABC， Children Neuropsychological Behavioral Scale， SRS， and WeeFIM. Results Statistically significant differences were observed in ABC， Children Neuropsychological Behavioral Scale， SRS， and WeeFIM scores among the three groups of pediatric patients（ F=905.384， 304.753， 303.085， 5 111.844； all P＜ 0.05）. The total scores of the Sensory Integration Ability Rating Scale for Children showed positive correlations with both the ABC total score and the SRS total score（ r=0.640， 0.744； both P ＜ 0.05）. The total score of the Sensory Integration Ability Rating Scale for Children showed negative correlations with each functional domain of the Children Neuropsychological Behavioral Scale and the total score of the WeeFIM（ r=-0.857，-0.567， -0.685，-0.754，-0.522； all P ＜ 0.05）. Conclusions Sensory abnormalities are prevalent among children with ASD， and the severity of sensory abnormalities correlates positively with symptoms， behaviors， and function defects.