Objective To explore the characteristics of sleep structure in chronic insomnia disorder(CID)with disharmony between heart and kidney pattern and liver qi stagnation pattern.Methods A total of 74 patients with CID who were treated in Tongde Hospital of Zhejiang Province from June 2021 to December 2022 were selected and divided into disharmony between heart and kidney group and liver qi stagnation group according to TCM syndrome differentiation types,with 37 cases in each group.Relevant parameters of both groups were collected and analyzed using polysomnography(PSG).Results The age of patients in disharmony between heart and kidney group was significantly higher than that in liver qi stagnation group(P<0.05).There were statistically significant differences in total sleep time,sleep efficiency,rapid eye movement sleep period,N1 stage and N3 stage between two groups(P<0.05).The results indicated that patients in disharmony between heart and kidney group had light sleep,low sleep efficiency and short total sleep time.Conclusion With the increase of age,most of the syndromes of CID patients are disharmony between heart and kidney pattern,and there are obvious differences between the two types of sleep structure.Patients with disharmony between heart and kidney pattern have light sleep and low efficiency,while patients with liver qi stagnation pattern have many dreams.