Abstract: Objective  To systematically evaluate the clinical effect of cognitive behavioral therapy on chronic insomnia. Methods  Chinese literature sources were explored for computer retrieval: CNKI，Chongqing Weipu Chinese Database, Wanfang Database, Chinese Biomedical Literature Database, and foreign literature retrieval databases include PubMed and The Cochrane Library. The randomized controlled trials(RCTs) of cognitive behavioral therapy for chronic insomnia were searched, and all literatures were included in the retrieval scope within the selfbuilt database until the time limit of November 8, 2018. References included in the literature were searched manually. Metaanalysis was conducted by RevMan 5.3 software after RCT screening, data extraction and quality evaluation independently by two individuals according to inclusion and exclusion criteria. Results  A total of 17 studies were included, involving 1 131 patients with chronic insomnia, and the methodological quality of the trial was partially low.  Compared with the control group, the sleep latency MD=-8.01, 95%CI was (-10.96,-5.06); the number of awakenings MD=-0.43, and the 95%CI was(-0.70,-0.16); the total sleep time MD=39.51, 95%CI (27.09, 51.93); the sleep efficiency MD=7.85, 95%CI (1.90, 13.80);  and Pittsburgh sleep quality index MD=-2.44, 95%CI (-3.32,-1.56);  the treatment efficiency OR=3.18, 95%CI (1.81, 5.61;  and the insomnia severity index MD=-1.30, 95%CI (-2.06, -0.54). Conclusion  According to current clinical evidence, cognitive behavioral therapy for  chronic insomnia is clinically reliable.

Key words: cognitive , therapy; , maintenance disorders； metaanalysis