A column-type coreless motor, comprising a body which includes a motor housing, a rotor and a stator, the motor is configured so that: the rotor is supported by bearings in the motor housing and an upper pressing cover, the stator is placed in a U-shaped annular groove of the rotor and positioned by the upper pressing cover and the motor housing, wherein the rotor is a column type structure with the U-shaped annular groove defined by a core shaft, a heat dissipation fan and a rotor housing; an end face of the rotor is provided with the heat dissipation fan which is embedded on the rotor housing; an inner side of the motor housing is provided with a heat dissipation air passage including guide vanes, wherein the rotor includes the core shaft, the heat dissipation fan, a clamp sleeve and inner permanent magnets and outer permanent magnets, wherein the inner permanent magnets are attached to an outer periphery of the core shaft, and the outer permanent magnets are fixed on an inner side surface of the rotor housing, wherein the inner permanent magnets are attached on the core shaft in a manner that N and S poles of the inner permanent magnets are alternately arranged, and the inner permanent magnets are locked on the core shaft by pressing and fitting the heat dissipation fan and the clamp sleeve on two ends of the core shaft respectively to snap annular protrusions of the heat dissipation fan and the clamp sleeve into grooves of the inner permanent magnets, and wherein the outer permanent magnets are evenly adhered to the inner side surface of the rotor housing with an adhesive in a manner that N, S poles of the outer permanent magnets are alternately arranged, to form an outer portion of the rotor, and the outer portion of the rotor is pressed and fitted to the heat dissipation fan to form an integral rotor. wherein the rotor is a column type structure with the U-shaped annular groove defined by a core shaft, a heat dissipation fan and a rotor housing; an end face of the rotor is provided with the heat dissipation fan which is embedded on the rotor housing; an inner side of the motor housing is provided with a heat dissipation air passage including guide vanes, wherein the rotor includes the core shaft, the heat dissipation fan, a clamp sleeve and inner permanent magnets and outer permanent magnets, wherein the inner permanent magnets are attached to an outer periphery of the core shaft, and the outer permanent magnets are fixed on an inner side surface of the rotor housing, wherein the inner permanent magnets are attached on the core shaft in a manner that N and S poles of the inner permanent magnets are alternately arranged, and the inner permanent magnets are locked on the core shaft by pressing and fitting the heat dissipation fan and the clamp sleeve on two ends of the core shaft respectively to snap annular protrusions of the heat dissipation fan and the clamp sleeve into grooves of the inner permanent magnets, and wherein the outer permanent magnets are evenly adhered to the inner side surface of the rotor housing with an adhesive in a manner that N, S poles of the outer permanent magnets are alternately arranged, to form an outer portion of the rotor, and the outer portion of the rotor is pressed and fitted to the heat dissipation fan to form an integral rotor.