The invention discloses an oil removal device for mechanical parts used for machining. The oil removal device comprises a base plate; a plurality of supporting rods are connected above the base plate;a collecting tank is fixedly arranged on the base plate between the supporting rods; and a first motor mounting groove is formed in the lower side of the supporting rod at the left side. According tothe oil removal device disclosed by the invention, clamping plates are arranged, and each of shifting bars is pulled by a handle, and thus, distance between the clamping plates is increased; then, each part is put between the corresponding clamping plates; each handle is loosened, and the corresponding clamping plates return to the original position under the action of reset springs, and therebythe part is fixed between the clamping plates; first miniature fans and second miniature fans are installed, and as hot air is blown out from second fan covers, solid oil is enabled to become liquid;cold air is blown out from first fan covers, so that the phenomenon that the parts are damaged due to the fact that the hot air is excessively hot can be avoided; during liquefying, a part fixing plate is driven to rotate by a second motor, and the parts are evenly heated, and while the part fixing plate rotates, oil on the parts is brushed off by utilizing a hairbrush.