Sleep disturbance is very common in children with autism spectrum disorder (ASD),and closely associated with their core symptom, social deficit.This trial investigates the effects of Cognitive behaviour therapy for insomnia (CBT-I) in children with autism spectrum disorder with sleep problems through synchronized eye-tracking and functional near-infrared spectroscopy (fNIRS). This is a 1:1 parallel single-blind randomized controlled trial.

sleep disturbance is significantly associated with social deficit of ASD and but the congnitive-neural mechanism underlying this association remains unclear. Cognitive behaviour therapy for insomnia (iCBT-I) is considered as an evidence-based treatment for insomnia. After 5 consecutive sleep interventions is a 2-year following up study, the above issue is further tested with emphasis on progressive trajectory from a developmental perspective. we examine the influence of sleep disturbance on face processing and neural response during naturalistic social behavior of ASD children using synchronized eye-tracking and functional near-infrared spectroscopy (fNIRS) to uncover the neural mechanism for that sleep disturbance influences social deficit.

Inclusion Criteria:

1. meet the diagnostic criteria for autism DSM-5 and ADOS-2;
2. age 24months to 59months s old;
3. willing to participate in this study, and can complete the following assessments at the specific time.

Exclusion Criteria:

Exclusion of severe respiratory diseases, schizophrenia, epilepsy and other brain diseases;

Participant blind