The invention belongs to matching devices of equipment for treatment and disposal of town sludge, and in particular relates to an automatic feeding device for treatment and disposal of town sludge. The automatic feeding device comprises a bracket, wherein universal wheels and directional wheels are arranged at the bottom of the bracket; two chain wheels and a chain are obliquely arranged on the bracket; a plurality of measuring hoppers are arranged on the chain equidistantly; the measuring hopper at the lower chain wheel is positioned at a sludge feed box, and the measuring hopper at the higher chain wheel is positioned above a sludge inlet of sludge treatment and disposal equipment butted with the measuring hopper; and a belt wheel is arranged on a rotating shaft of the lower chain wheel, the lower chain wheel is connected with a reduction box by virtue of the belt wheel and a belt, and the reduction box is connected with an adjustable-speed motor by virtue of the belt wheel and the belt. The automatic feeding device for treatment and disposal of the town sludge, provided by the invention, is relatively high in automation degree, is flexible to move, and can perform quantitative metering.