The invention relates to the technical field of modification treatment for wicker for wickerwork, in particular to an enhancing pretreating agent for the anion healthcare effect of wicker for wickerwork and a preparing method of the enhancing pretreating agent. The enhancing pretreating agent comprises, by weight part, 0.1-0.2 part of anion powder, 0.1-0.2 part of polyvinylpyrrolidone, 6-8 parts of clear whitewash, 10-12 parts of silica sol with the solid content being 20-25%, 1-2 parts of polyoxyethylene, 0.2-0.3 part of alkyl sodium sulfonate, 0.1-0.2 part of sodium chloride and 40-50 parts of water. The pretreating agent seeps into the wicker fiber through the high pressure, anion powder, nanometer silicon and other composite carriers in the pretreating agent enter the fiber, the enhancing, tenacity enhancing and other modification effects are achieved, the treated wicker can durably release anions to the environment, and a certain healthcare effect is achieved; and the enhancing pretreating agent is particularly suitable for being used in the indoor environment, the service life of a product woven through the pretreated wicker is longer, the bearing force is increased, and the use value of accessories is higher.