The invention provides an air-suction seed discharging device, which comprises an air suction component, a roller component, a shell component and a clamping component. The air suction component comprises a seed suction part which is provided with seed suction portions; the air suction component is connected with the roller component; the clamping component is connected in the shell component andcomprises a first guide part, a second guide part and clamping parts, the first guide part is connected with the shell component, the second guide part is in relatively rotational connection with thefirst guide part, and the clamping parts are in movable connection with the second guide part and arranged corresponding to the seed suction portions. The air-suction seed discharging device has advantages that the seed fixing performance of a seed discharging tray can be improved, early falling of seeds is prevented, and the problem of missing seeding caused by early falling of the seeds is solved. The invention further provides an air-suction hole-sowing apparatus comprising the air-suction seed discharging device.