In order to solve the traditional mechanical vegetable seeder can not realize the problem of precision sowing and the existence of injured seeds, a radish spoon type precision seed discharger was designed. Seed filling, seed cleaning and seed feeding were accomplished by using a seed scoop suspended from the side of the seed tray, realizing a non-touch operation process. The movement of seeds into and out of the seed scoop was analyzed theoretically, and to clarify the rationale for its non-injurious nature, the basic structural parameters of seed disks, seed scoops and seed tubes were determined, EDEM discrete element simulation software was used to simulate the working process under different structural dimensions of the seed-rowing spoon. The test factors were the diameter and depth of the hole in the seeding spoon and the rounding ratio of the release surface, single grain rate, multiple grain rate and empty grain rate were used as test indicators. Simulation experiments were conducted by using a 3-factor, 5-level secondary general rotary combination design, the optimal structure parameters of the seed discharge spoon for the hole diameter of 5mm, the depth of 4.3mm, the release surface fillet ratio of 0.12 were determined. Based on discrete element simulation of this parameter, bench testing was done via a homemade seed dispenser test bed and attachment of seed displacer to planter for field trials. The results of the simulation test were as follows: single grain rate was 93%, multiple grain rate was 4%, empty grain rate was 3%. The results of the bench test were as follows: the mean value of the pass index was 92.2%, the mean value of the reseeding index was 4.6% and the mean value of the leakage index was 3.2%，the relative errors were 0.86%, 15% and 6.67%, respectively. The results of the field trial were as follows: the mean value of the pass index was 90.5%, the mean value of the reseeding index was 6.9% and the mean value of the leakage index was 2.6%，which demonstrated good performance of precision seeding with this seed dispenser. Comparison test of simultaneous damage rate with brush fossa wheel seed discharger showed that the injury rates were 0.43% and 1.27%, respectively，relative error was 66.14%，indicating a significant reduction in seed damage.