Objective: The present study is to clarificate Decoction of Xiaoerxishi Syrup Prescription. Methods: Two processes including chitosan flocculation and ethanol precipitation were appraised by comparison of extract percent, liquid clarity and hesperitin content, which was determined by HPLC, after the conditions of each process were optimized with respect to the volume ratio of ethanol to the decoction for ethanol precipitation and processing temperature, the concentration and amount of chitosan for chitosan flocculation. Results: The process of ethanol precipitation is better than that of chitosan flocculation.