The present invention relates to a method for manufacturing fuel using livestock manure, sewage sludge, and food waste and, more particularly, to a method for manufacturing fuel using livestock manure, sewage sludge, and food waste, wherein the livestock manure, sewage sludge, and food waste can be recycled and can be used as low-priced heating materials. The present invention comprises: a raw material pulverizing step of preparing chaff and waste wood powder, providing the chaff and the waste wood powder to a pulverizer, and pulverizing the chaff and the waste wood powder to be 6 to 14 mm in size; a compressing and drying step of supplying 50 to 70 parts by weight of mixed raw material of one or more among unprocessed livestock manure, sewage sludge, and food waste to a compressor, primarily removing moisture, supplying the mixed raw material to a drier, inputting 15 to 35 parts by weight of chaff and 15 to 35 parts by weight of waste wood powder, which have been prepared in the raw material pulverizing step
