The invention discloses a precise seeds sowing device for growing seedlings of an aperture disk, which comprises a seeds box, an outlet aperture adjuster, a curtain flow stabilizing plate, a seeds sowing bracket, a pneumatic distribution system and a pneumatic adjustment system; and the outlet aperture adjuster is used for adjusting the size of an outlet of the seeds box, and the seeds are distributed by means of single seed, are orderly arranged and are basically even in density under the action of the curtain flow stabilizing plate after the seeds are flowed out. The pneumatic adjustment system comprises an air compressor and an air pressure adjusting loop connected with the air compressor, wherein a pneumatic distribution central shaft and a rotary drum are divided into a negative pressure cavity and a positive pressure cavity by a seal clapboard: the positive pressure cavity is directly communicated with the atmosphere, the seeds are discharged by means of pressure release when the rotary drum is rotated to the positive pressure cavity, and the seeds are absorbed when the rotary drum is rotated to the negative pressure cavity, therefore, the seeds charge and the seeds absorption are alternately preformed under the continuous rotation of the rotary drum. The device is reasonable in structure, and is novel and simple in principle, so that the precise seeds-sowing is directly realized under the self gravity of the seeds and the free movement of the seeds, and the requirement for applying an outer force such as the vibration and the like in the other various seedlings-growing modes is overcome.