Abstract: Precision seed metering mechanism is the core component of field breeding planter, in order to measure the performance, the quadratic regression orthogonal rotating design was used to test the performance of pneumatic precision seed metering device on the JPS-12 seed metering performance testing bench, the range of seeding qualified index was 72.31%～98.17%, the range of miss index was 0.51%～18.7% and the range of multiples index was 0.91%～23.07%. The regression equation was received by regression analysis of the test results, and three dimensional figures were drawn with MATLAB. Various effects to the experimental indexes by each factor can be received which provided reliable basis for the further optimization design of precision seed-metering device.