The invention discloses a feeding ash cleaning device of a drying oven for automobile angle adjusting device surface treatment. The ash cleaning device is arranged on a feeding port of the drying oven and comprises two supports fixed on a drying oven casing, the supports are arranged on two sides of the feeding port of the drying oven, a nozzle is arranged on each support, and the position of the spraying end of each nozzle is matched with the position of a part of an angle adjusting device to be treated when the part is conveyed to the feeding port. Each nozzle is connected with an air supplying pipe, the air supplying pipes are connected with an air source, electromagnetic valves are arranged on the air supplying pipes and connected with an automatic control device, and sensors for detecting whether the part of the angle adjusting device to be treated enters a blowing area are arranged on the supports. The feeding ash cleaning device can replace manual ash cleaning, improve ash cleaning efficiency and quality and ensure that a product surface treatment effect is optimal.