To study the effects of penetration enhancers and their combinations on the curcumine transdermal drug delivery (CUR-TDDS).The penetration rate of curcumin through rat skin in vitro was measured using Valia-Chien diffusion cells, and orthogonal design method was set up for experimental design.The optimum penetration enhancers were: 3% hydroxypropyl beta cyclodextrins (HP-beta-CD), 9% borneol and 3% peppermint oil.The HP-beta-CD has the most potent enhancing effect.