The invention relates to the technical field of seedling-growing seeding devices and especially relates to a roller-type aperture disk seedling-growing seeding device and a seedling-growing seeding mechanism. The roller-type aperture disk seedling-growing seeding device comprises a frame. A roller is rotatingly arranged on the frame. A seed tank and a seed protection plate surrounding the roller are fixedly arranged on the frame. The end part of the roller is provided with a seed blocking structure. A seed avoiding gap is formed between the seed protection plate and the roller. The seed avoiding gap is communicated with the seed tank. Seed-shaped holes for seed embedding are arranged on the roller. A part of the seed protection plate below the roller is provided with a seed falling opening. The roller-type aperture disk seedling-growing seeding device solves the problems of miss-seeding and a high re-seeding rate of the existing air-aspiration type seeding device.