The invention discloses an efficient soil purification device for heavy metal pollution, the efficient soil purification device comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a support frame, the inner wall, close to the top, of the support frame is fixedly provided with a mixing box, the top in the mixing box is fixedly connected with a fixing sleeve, and the surface of the fixing sleeve is sleeved with a second gear; a fixing frame is fixedly connected to the top of the mixing box, a second motor is fixedly mounted at the top in the fixing frame, amounting rod is connected to an output shaft of the second motor, the end, close to the mixing box, of a spiral feeding pipe extends into the mixing box, and a crushing box is connected to the upper surface of the end, away from the mixing box, of the spiral feeding pipe. By means of turnover and rotation of stirring rods and shape setting of the stirring rods, the mixing range is widened, meanwhile, the mixing strength is improved, and therefore the soil purification efficiency of chemical agents is greatly improved.