OBJECTIVE： To optimize the water extraction technology of Chaihu anxin capsules. METHODS： Taking comprehensive scoring value of  the contents of gallic acid，chlorogenic acid，puerarin，glycoside，rutin，cinnamic acid， quercetin and the yield of extract as investigation index， using multiple of adding liquid， soaking time， reflux time and extraction times as factors， water extraction technology of Chaihu anxin capsule was optimized by Box-Behnken response surface method based on single factor test. Validation test was conducted. RESULTS： The optimal extraction technology of Chaihu anxin capsules was adding 11 times of water， soaking for 10 h， extracting for 2 times， refluxing for 1.5 h each time. In validation test， the relative deviation of comprehensive scoring value to predicted value was 1.87％ for 3 batches of samples （RSD＜2％， n＝3）. CONCLUSIONS： The optimal extraction technology is simple， stable and suitable for further production of Chaihu anxin capsules.