An automatic hub forging die lubricant cleaning device, comprising a lifting hydraulic cylinder, a limiting block, a hinge, a hydraulic piston rod, a fixed connecting rod, a hinge shaft, a connecting plate, a hydraulic cylinder, a further hinge, a hydraulic cylinder fixing seat, a lubricant cleaning scraper, a main body frame, a support crossbeam, a die supporting tray, a servo motor, a foundation crossbeam, bases, rolling bearings, a left lubricant cleaning scraper, a bolt, a left hydraulic cylinder assembly, a guide post, a guide sleeve, a plugging lock pin, a lifting hydraulic cylinder supporting crossbeam, a brush lifting hydraulic cylinder, a lifting bracket, a brush servo motor, a linear guide rail, a translation hydraulic cylinder, a horizontal bracket, a connecting key, a further bolt, a connecting sleeve, a ball brush fixer, a steel ball brush, a detergent storage tank, a nozzle, a middle upright post and a fixed plate, wherein: the main body frame is of a structure comprising four upright posts and an upper cross beam, a middle cross beam and a lower crossbeam, the support crossbeam is the middle crossbeam, and the foundation crossbeam is the lower crossbeam; the servo motor is fixed below a large plate of the support crossbeam, the shaft of the servo motor is connected with the lower rotating shaft of the die supporting tray, and the die supporting tray is attached to the bottom of a die; two positioning pins are arranged on the die supporting tray, and the positioning pins are connected with bottom positioning holes of the die to ensure that the supporting tray drives the die to rotate; the rolling bearings are arranged below the die supporting tray and on the large plate of the support crossbeam to ensure the die supporting tray rotates at a low speed; the left hydraulic cylinder assembly is arranged on an upright post plate on the left side of an upright post of the main body frame via a connecting screw, and the left lubricant cleaning scraper is connected with the piston rod of the left hydraulic cylinder assembly; the hydraulic cylinder fixing seat is fixed in the middle of the right side of the main body frame, the hydraulic cylinder is connected with the hydraulic cylinder fixing seat via the hinge shaft, the hydraulic piston rod is connected with the fixed connecting rod via the hinge, the fixed connecting rod is fixedly connected with the lifting hydraulic cylinder supporting crossbeam, the fixed connecting rod is configured to rotate under the action of the hydraulic cylinder by using the hinge shaft as a shaft, the limiting block is connected to the guide post, the guide post is connected with the connecting plate, and the connecting plate is connected with the lubricant cleaning scraper; the guide sleeve is arranged in the lifting hydraulic cylinder supporting crossbeam; when the lifting hydraulic cylinder supporting crossbeam is horizontal, the plugging lock pin is plugged into the left upright post of the main body frame; the lifting hydraulic cylinder supporting crossbeam is horizontally fixed to keep stable; the brush lifting hydraulic cylinder is connected with the lifting bracket and arranged on the horizontal bracket, and the brush lifting hydraulic cylinder is configured to drive the brush servo motor to be dragged up and down along the linear guide rail; the translation hydraulic cylinder is arranged on the fixed plate and the middle upright post, and the translation hydraulic cylinder is connected with the horizontal bracket and configured to be horizontally dragged along the linear guide rail; the connecting sleeve is connected with the main shaft of the servo motor by the connecting key and the further bolt; the steel ball brush is arranged below the ball brush fixer, the ball brush fixer is connected with the connecting sleeve, the nozzle is connected with the detergent storage tank via a rubber tube, and the nozzle is arranged in the middle of the upright post in a manner of tilting 45 degrees to just spray a detergent to the working surface of the die.