Abstract：Cognitive impairment and insomnia are common complications after stroke，which seriously endanger the quality of life and prognosis of patients with stroke. This paper comprehensively concludes the pathogenesis and evaluation method of cognitive impairment and insomnia after stroke，and summaries the research progress on Chinese and western medicine for cognitive impairment and insomnia after stroke，so as to provide new ideas for Chinese and western medicine in treating cognitive impairment complicated with insomnia after stroke.