The invention discloses a poultry feed stirring device and a cutter thereof. The poultry feed stirring device comprises a fixing shaft, a case main body and a hydraulic switch device, wherein the hydraulic switch device is fixedly mounted below a controller; a discharge hole is formed below the hydraulic switch device; a discharge tank is fixedly mounted on one side of the discharge hole; the fixing shaft is fixedly connected with a first blade, a second blade, a fourth blade and a third blade; a square pin is mounted in the central part of the bottom end surface inside the case main body; an engine rotating shaft is connected with the square pin; a second bracket is fixedly connected with the side, close to the discharge tank, of an engine; a first bracket is fixedly connected with the other side of the engine; a rotating shaft is fixedly mounted at the upper end of the side, close to a travel switch, of the case main body; the rotating shaft is rotationally connected with an upper end cover. The poultry feed stirring device is reasonable in structure, uniform in stirring, free of material scattering and convenient and practical as the cutter can be taken out to wash at any time, and thus the use efficiency is greatly improved.