The invention discloses an integral hub which comprises a hub body. Two oppositely-arranged bearings are arranged in the hub body, a connecting sleeve used for mounting a shaft in a sleeved manner is arranged in inner rings of the bearings, an annular protrusion is arranged at one end of the connecting sleeve and abutted against the inner ring of one of the bearings, a retaining ring abutted against the inner ring of the other bearing is arranged at the other end of the connecting sleeve, the retaining ring and the connecting sleeve are in interference fit, and a first sealing element is arranged between each of the annular protrusion and the retaining ring and the hub body. Consequently, when the integral hub is provided to a client, the hub body, the bearings and other components are combined together to form an integral member which is high in sealability, and convenience is brought to the client when using the integral hub. Comparing the structure with an existing structure, a mode that the inner rings of the bearings receive axial mounting force is converted into a mode that the connecting sleeve receives axial mounting force, so that deformation of a rolling way due to the fact that force acts on the bearings is prevented, accuracy of the bearings is improved, and service life of each bearing is prolonged; independent sealing and lubricating effect is realized.