The dl-tetrahydropalmatine flexible liposomes were prepared by film dispersion method, and its transdermal absorption effect was studied by using modified Franz diffusion cell method.The particle size of flexible liposomes was (112.3±59.2) nm with a normal distribution basically, and the entrapment efficiency was 82.7%.Cumulative permeation amount of dl-tetrahydropalmatine flexible liposomes was 2,121 μg within 12 h, which was significantly higher than that of tincture (1,153 μg).The retention rate in skin was 53.9%, which was obviously higher than that of tincture (11.2%).Transdermal absorption effect of these prepared dl-tetrahydropalmatine flexible liposomes was superior to that of tincture.