In order to meet the requirements of planting rice directly in the hill,4 kinds of different structure groovewheel seeding device were designed. The EDEM,a discreet element analysis software,was used to simulate and analyze the above 4 types of grooves,and then the tentative was done for the trough planers with different structures.The results showed that when the groove was hookedly-shaped,the angle of the slot was 14.01°and the rotating speed of seed row wheel is 21. 09 r/min,with the best rate of average hill diameter being 96. 43% and the ...