For the randomness and uncertainty of seed movement in sowing process of the clamping dibbler, high-speed photography technique was used to analyze the operating process of the improved clamping dibber. The seeds in seed-collecting area could make two seeds circulation movements flows, which could make twice scouring seed-filling, and the seed speed relative to the seed-room was greater than unimproved dibbler, so the probability of seed-filling was increased. The main reason leading to seed-missing of seed-collecting devices was that two seeds were placed in parallel in the seed-clamping mouth. There were three ways to achieve seed-cleaning operation, one was that seeds fall under the action of gravity, another was that seeds were squeezed out the seedclamping mouth with the seed-clamping mouth litter, and the third was that seeds fall due to the equilibrium position of seeds disappear as the dibbler rotating. The average velocity of seeds entering the seed-clamping mouth decreased gradually with increasing of dibbler rotational speed. The findings were beneficial to comprehend the working process of dibbler microscopically.