Abstract: According to the component analysis and study of current dewaxing agent, reasons for low liquid recovery rate was high content of light components. In order to improve liquid recovery rate of dewaxing agent, according to the comparative analysis and simulated calculation of various dewaxing agents, injecting quality, recovery rate and composition of dry gas to achieve the same dewaxing effect were obtained. Combining market price and transportation cost of various dewaxing agents, the injection cost of dewaxing agent was comprehensively analyzed, the optimum dewaxing agent was dina condensate, injection rate was equivalent to the current one, liquid recovery rate increased from 23.43% to 78.28%, the injection cost was saved by 72.77%.