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As one of the most important working components of harvester, the cutting performance of cutter directly affects the quality of crops harvest and the subsequent transportation effectiveness. The reciprocating cutter structural parameters of the selfdesigned Artemisia selengensis orderly harvester and the physical parameters of Artemisia selengens is were studied, the three dimensional entity model of cutter and flexible simplified model of crop stem were built by software Pro/E, and the coupled dynamics simulation analysis was proceeded through dynamic analysis software ADAMS according to the parameters acquired. The cutting speed vg, cutting angle α and working speed vm of the cutting system were selected as factors, the cutting force F and recutting ratio γwere selected as evaluating indicators to design a virtual orthogonal experiment with three factors and three levels. The response surface methodology (RSM) regression analysis and variance analysis were applied to analyze the results, and compared with the test results of field experiment. The results showed that RSM optimum combination was vg=1.6 m/s, α=15°,vm=1.0m/s, cutting force F and recutting ratio γ were effectively reduced with this combination, the comparison results showed that the cutting force error was less than 10.9% and the recutting ratio error was 11.3%, indicating the effectiveness of the simulation analysis and regression forecasting model. The study illustrated that the reciprocating cutter designed could satisfy the demands of Artemisia selengens is orderly harvest, and had a certain reference value.