Objective:To choose the optimal extraction conditions of Rhizoma Atractylodis and Cortex Magnolioe Officinalis compatibility by supercritical CO2 and control the quality of the extract.Method:The orthogonal design experiments were used to choose the optimal conditions and the factors were extraction temperature,extraction pressure,resolution temperature and resolution pressure.The extraction rate was used as inspection index.The essaying by HPLC was established.Result:The optimal conditions were as follows:...