Abstract: A new type of seed meter using low air pressure was introduced; the structure, working principle and main parameters of the seed meter were expounded in this paper. And the effects on seeding performance were studied by experiments, which deal with the air pressure inside the seed meter, rotation speed of the disc and the height of the seeds' surface in seed-box. The results showed that the main factor is the air pressure inside the seed meter, and the height variation of the seeds' surface in seed-box almost doesn't affect the seeding performance. As a new type of seed meter, it has been employed in the direct seeder (model: 2BQYF-6A) successfully.