The invention discloses an axial flow pump which comprises a shell part and a pump body part, and is mainly composed of a submersible motor, a bearing, a shaft, a guide vane, a shaft, an impeller andthe like. The pump body part of the axial flow pump is composed of the bearing, the motor, the guide vane, the impeller and the shaft. The blade tip clearance dimension of blades is reduced by 20-30%compared with the conventional size. The impeller is fixed to the rotating shaft and located below an inner cylinder of the guide vane, the appearance of the lower end of the shell is in a horn mouthshape, the blades are vertically arranged on the surface of a wheel center cone at a certain inclination and spacing, the structure is similar to a screw propeller having a small end radius and a large root radius, and the outlet portion is in an axial flow type. The novel axial flow pump is large in flow, free of clogging, high in efficiency and capable of saving energy, and has the advantages ofbeing easy to operate, convenient to maintain and low in price.