This article makes a research on the process of Houttuynia cordata powder. The results show that following the process as below can obtain the products with the best quality. Firstly dip the clean Houttuynia cordata in 0.1%critic acid solution,at 100;then take them out after 1.0min,dip them in 0.1% NaHSO3 for 30min,dry them in a vacuum drier which can hold a constout tempreture all the time,at last,crush and pack them. This product has the natural flavor of Houttuynia cordata as well as medical and other effects.