The invention discloses a high-efficiency flour dough kneading machine for food processing. The machine comprises a machine base body, wherein a mounting cavity with an upward opening is formed in themachine base body; a dough kneading barrel body is mounted in the mounting cavity; a sinking groove is formed in the bottom wall of the mounting cavity; a first cavity is formed in the rear side of the sinking groove; a second cavity which is arranged in a left-right extending manner is communicated with the rear side of the first cavity; the first cavity is internally connected to a first sliding block in sliding fit; the second cavity is internally connected to a second sliding block in sliding fit; a first motor is fixedly arranged in the first sliding block; the tail ends of the left andright sides of the first motor are connected to first outer key shafts in power fit; the second sliding block is internally in sliding fit connection with a guide slide rod which extends left and right; and the tail ends of the left and right sides of the guide slide rod are respectively in fixed fit connection with the left and right inner walls of the second cavity. The machine has high safety,is easy to assemble, disassemble and clean, and greatly improves the use effect and practicability.