An omnidirectional wheel comprising: a hub; and a plurality of wheels; wherein: the hub comprises a main body, a first support portion, and a second support portion; the first support portion and the second support portion are provided on an outer periphery of the main body along an axial direction of the main body; the first support portion and the second support portion define a plurality of mounting grooves, the plurality of mounting grooves is evenly arranged around a circumference of the main body, the plurality of mounting grooves of the first support portion is staggered with the plurality of mounting grooves of the second support portion; each mounting groove defines an axle provided therein; each of the plurality of wheels comprises a roller and a cover layer, the roller is rotationally provided on the axle perpendicular to the axial direction of the main body; each of two ends of the roller defines a fixing hole; the axle extends through each of the two fixing holes; and the cover layer is sleeved on an outer side of the roller, characterized in that, the axle comprises a rotation shaft and a mounting shaft disposed in the mounting groove facing each other and perpendicular to the axial direction of the main body; each of the rotation shaft and the mounting shaft is inserted into a corresponding fixing hole defined in the roller to mount the roller in the mounting groove. a hub; and a plurality of wheels; wherein: the hub comprises a main body, a first support portion, and a second support portion; the first support portion and the second support portion are provided on an outer periphery of the main body along an axial direction of the main body; the first support portion and the second support portion define a plurality of mounting grooves, the plurality of mounting grooves is evenly arranged around a circumference of the main body, the plurality of mounting grooves of the first support portion is staggered with the plurality of mounting grooves of the second support portion; each mounting groove defines an axle provided therein; each of the plurality of wheels comprises a roller and a cover layer, the roller is rotationally provided on the axle perpendicular to the axial direction of the main body; each of two ends of the roller defines a fixing hole; the axle extends through each of the two fixing holes; and the cover layer is sleeved on an outer side of the roller, characterized in that, the axle comprises a rotation shaft and a mounting shaft disposed in the mounting groove facing each other and perpendicular to the axial direction of the main body; each of the rotation shaft and the mounting shaft is inserted into a corresponding fixing hole defined in the roller to mount the roller in the mounting groove. the hub comprises a main body, a first support portion, and a second support portion; the first support portion and the second support portion are provided on an outer periphery of the main body along an axial direction of the main body; the first support portion and the second support portion define a plurality of mounting grooves, the plurality of mounting grooves is evenly arranged around a circumference of the main body, the plurality of mounting grooves of the first support portion is staggered with the plurality of mounting grooves of the second support portion; each mounting groove defines an axle provided therein; each of the plurality of wheels comprises a roller and a cover layer, the roller is rotationally provided on the axle perpendicular to the axial direction of the main body; each of two ends of the roller defines a fixing hole; the axle extends through each of the two fixing holes; and the cover layer is sleeved on an outer side of the roller, characterized in that, the axle comprises a rotation shaft and a mounting shaft disposed in the mounting groove facing each other and perpendicular to the axial direction of the main body; each of the rotation shaft and the mounting shaft is inserted into a corresponding fixing hole defined in the roller to mount the roller in the mounting groove.