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Aiming at the problems such as high seed damage rate and the requirement about seed grading pre-treatment of the mechanical Panax notoginseng seedling seeding device, a kind of air suction roller sowing seed device was designed by using the working principle of negative pressure seed suction, brush rolling and clean seed, and positive pressure throwing seeds. Through the mechanical analysis of the filling stage, the clearing stage, the carrying stage and the sowing stage, the main structural parameters of the seed-arrangement were studied and the main influencing factors of the performance of the seed-arrangement were analyzed. In combination with single factor test results, vacuum degree, drill speed, filling indoor seed quality as test factors, taking the qualified index, the missed seeding index, and seeding replant index as test indexes, three factors five levels quadratic orthogonal rotating test was carried out, to establish the regression equation between the test indexes and test factors, using the Design-Expert 10.0 software, by using the response surface method, all the factors affecting the filling performance of primary and secondary sequences were analyzed as follows: working speed of the seeder, degree of vacuum, and seed quality. Through parameter optimization, it was concluded that the optimal combination of parameters was as follows: the working speed of the seeder was 0.18m/s, the vacuum degree was 9.6kPa and the seed quality of the filling chamber was 1.2kg. At this time, the qualified index was 95.6%, the seeding replant index was 0.4% and the missed seeding index was 4.0%, which can meet the agronomic requirements of Panax notoginseng sowing.