Novel axial flow fan hub structure

The novel axial flow fan hub structure comprises a hub and a plurality of fan blades, the hub comprises a shaft hole part, a plurality of vertical plate parts, a plane part and a plurality of connecting blocks, the vertical plate parts are arranged at intervals in the circumferential direction of the shaft hole part, one end of each vertical plate part is connected with the side wall of the shaft hole part, and the other end of each vertical plate part is connected with the corresponding connecting block. The plane part is connected with the lower end of the connecting block and the lower end of the vertical plate part. The upper end of the connecting block is provided with a first concave part. The concave shape of the first concave part is matched with the shape of one end, close to the shaft hole part, of the fan blade, the fan blade is connected with the side wall of the first concave part, and the pressure surface of the fan blade is aligned with the upper end surface of the first concave part; the multi