Inclusion Criteria:  those who met the diagnostic criteria for acute anterior circulation ischemic stroke; first stroke, no previous history of organic encephalopathy; the onset is less than 72 hours; it is in line with the TCM diagnosis of phlegm heat; aged 40 to 80 years old.  Exclusion Criteria:  Transient Ischemic Attack (TIA) ; those who have received thrombolytic therapy; the examination confirmed that the stroke was caused by the brain tumor, brain trauma or blood disease; cerebral embolism caused by rheumatic heart disease, coronary heart disease and other heart disease combined with atrial fibrillation; complicated with liver and kidney hematopoietic system endocrine system and other serious diseases and osteoarthropathy; prior mental disorder or severe dementia; patients with concurrent infection and fever; patients with primary or secondary epilepsy; those who had taken sedative drugs or sleeping drugs 3 days before the examination.