The invention discloses a percutaneous absorption reinforcing agent, which comprises the following components: the gum turpentine oil 3 percent to 5 percent, the urea ethanol solution 51 percent to 94 percent, the laurocapram 1 percent to 6 percent and the propanediol 2 percent to 8 percent. The invention has the advantages capability of application alone or with the external use drug, quick results, good curative effect, and great clinical value.