The invention relates to the technical field of surface coating devices, and particularly discloses a special-shaped glass powder feeding device. The device comprises a box body, a vacuum pump, a power mechanism, a working mechanism and a transmission mechanism; the power mechanism comprises a motor, a first gear and a first rack meshed with the first gear, and the middle section of the first rackis provided with a paw for fixing special-shaped glass; the transmission mechanism comprises an L-shaped handle arranged on the first rack and a cylinder body, wherein a first piston is arranged inside the cylinder body in a sliding fit mode, and the free end of the handle is fixedly connected with the first piston; the working mechanism comprises a groove body communicating with the cylinder body and a bearing groove arranged above the groove body, the size of the bearing groove is larger than the size of the special-shaped glass, and the groove body is arranged at the bottom of the box body; and a second piston is arranged in the groove body in a sliding fit mode, and the second piston is fixedly connected with a crank sliding block mechanism for driving horizontal reciprocating motionof the bearing placing groove. According to the technical scheme, the surface of the special-shaped glass can be uniformly coated with powder, and therefore, the device can be widely applied to the powder feeding of the special-shaped glass.