The invention discloses automatic watermelon cleaning equipment. A soaking area and a draining area are sequentially arranged in a cleaning tank, the bottom surface of the soaking area is gradually increased from the soaking area to the draining area, a conveying mechanism is located above the cleaning tank, a lifting cage is located above the cleaning tank and mounted on the conveying mechanism,a discharging port is formed in the bottom of the lifting cage, a rotating shaft perpendicular to a conveying chain and arranged horizontally is arranged on one side, away from the draining area, of the discharging port, a baffle is arranged in the discharging port, and one end of the baffle is rotationally mounted on the lifting cage through the rotating shaft. By the aid of the optimized and designed automatic watermelon cleaning equipment, watermelons in the lifting cage sequentially pass through the soaking area and the draining area under the action of the conveying mechanism, when the watermelons enter the draining area from the soaking area, the bottom of the lifting cage is opened downwards, the watermelons roll along the baffle to the draining area from the lifting cage for draining, automatic cleaning of the watermelons is realized, and no secondary damage is caused during cleaning.