The invention discloses a feedstuff crushing and proportioning machine. A left weighing hopper and a right weighing hopper are mounted on a bracket platform through supporting columns, electromagnetic valves are respectively mounted at a discharge opening of the left weighing hopper and a discharge opening of the right weighing hopper, and weighing sensors are mounted at the lower ends of the supporting columns and are electrically connected with a PLC; a crushing casing is mounted under the bracket platform, and a crushing device is mounted in the crushing casing; the crushing device comprises a horizontal rotating shaft, vertical rotating shafts, vertical crushing blades and horizontal crushing blades, wherein the vertical crushing blades are integrally arranged on the outer wall of the horizontal rotating shaft, the vertical rotating shafts are integrally shaped at two ends of the horizontal rotating shaft, and the horizontal crushing blades are integrally shaped on the outer walls of the vertical rotating shafts. The machine has the advantages of being rapid in proportioning, high-efficient and thorough in crushing and the like, and is suitable for large-scale popularization.