Objective To observe the clinical efficacy of Yangxue Qingnao Granule on insomnia and cognitive function in the treatment of chronic cerebral circulation isufficiency(CCCI).Methods 80 CCCI patients were equally randonfized to two groups by the time:the study group was treated with Yangxue Qingnao Granule,and the control group with compound Danshen Tablet,both was 68 cases.Observed the efficacy on insomnia(evaluated with Arson's Insomnia Scale)and cognitive function(tested with MMSE score,HDS integral evalua...