Abstract:Based on the L 9 (3) 4 orthogonal design with the amount of ginger,amount of alum and decocting time as working factors,and using the method of recording comprehensive scores,an experimental study has been made on the optimization of processing technology for Rhizoma Pinelliae by ginger and alum as stipulated in the Pharmacopoeia.The result shows that the best process is to use 15kg of ginger juice and 8kg of alum per 100kg of Pinellia ternata and decoct them together for 2～3 hours till the juice is fully absorbed by Rhizoma Pinelliae.