Extraction method of alkaloid compounds in radix stephaniae tetrandrae

The invention belongs to the technical field of extraction of active ingredients of traditional Chinese medicines and natural medicines, and relates to a method for extracting alkaloid compounds from radix stephaniae tetrandrae. The extraction method provided by the invention comprises the following steps: mixing radix stephaniae tetrandrae powder and a deep eutectic solvent, and carrying out ultrasonic extraction to obtain a radix stephaniae tetrandrae alkaloid extract; the stephania tetrandra alkaloid extract is prepared from tetrandrine and fangchinoline; the eutectic solvent comprises a hydrogen bond acceptor and a hydrogen bond donor; the hydrogen bond receptor comprises choline chloride; the hydrogen bond donor comprises one or more of polyhydric alcohols, organic acids and carbohydrates. According to the extraction method provided by the invention, the extraction rate of tetrandrine and fangchinoline is relatively high.