The utility model relates to the technical field of low-cost automatic feeding devices for special-shaped parts, and discloses a low-cost automatic feeding device for special-shaped parts, which comprises a bottom plate, a lifting mechanism is fixedly mounted at one end of the upper end of the bottom plate, and a supporting seat is movably mounted at the upper end of the lifting mechanism. A movable shaft is fixedly installed at the lower end of one side of the supporting seat, a sliding rail bearing rod is fixedly installed at the inner end of the supporting seat, and a supporting guide rod is slidably installed at the upper end of the sliding rail bearing rod. The workpiece feeding process is ensured to be accurate and errorless, the supporting guide rod is used for supporting and fixing, the adjusting guide rod is used, the sliding rail bearing rod bears the weight of the part, the part automatically slides down under the action of the gravity of the part, the angle of the supporting seat can be adjusted through the arranged lifting mechanism, and better use prospects can be brought.