The invention discloses an ore screening device for mining. The ore screening device comprises a machine box. The interior of the machine box is hollow, a feed port is formed in the right side position of the top face of the machine box, and a charging hopper is welded to the position of the feed port. A plurality of vibrating screens which are arranged at intervals from top to bottom are arranged at the positions below the feed port, the screening holes of the vibrating screens sequentially become smaller from top to bottom, and the vibrating screens are obliquely and downwards arranged from right to left. The right end portions of the vibrating screens are connected with connecting bases in a welded manner. According to the ore screening device, under the action of high-pressure water flow, ore surfaces are flushed, meanwhile, due to the fact that when ore tumbles along the vibrating screens, the effect of the acting force of the high-pressure water flow is small, the tumbling speed of the whole ore is reduced, and at the time, the screening time is correspondingly prolonged, and the quality of vibrating screening is improved; and under the long-time vibration action, disintegrating slag on the ore surfaces disengages, the water flow flushes the disintegrating slag away, and therefore the screening efficiency of the ore is more remarkable.