The invention discloses a direct-coupled magnetic suspension fan. The direct-coupled magnetic suspension fan mainly comprises a shaft, a bearing, an impeller, a permanent magnet rotor, a stator coil and an impeller shell; the permanent magnet rotor, the shaft and the impeller are fixed and arranged in the impeller shell; a magnetic suspension group is axially mounted on the shaft, the bearing is a magnetic suspension bearing, the stator coil is arranged at the other side outside the impeller shell in a position corresponding to the permanent magnet rotor, the stator coil is coupled with the permanent magnet rotor, and then the structure forms a brushless and coreless direct-current motor; the brushless and coreless direct-current motor is matched with a brushless motor driver in use, and is low in starting current, free of iron loss, large in torque, high in power factor and low in grid impact, and furthermore, the motor efficiency is improved. The rotor is directly driven by the coil; as the rotor and the impeller as used, the use of a high-speed coupling is avoided and the cost is reduced, and the system efficiency is improved and the weight is reduced; the direct-coupled magnetic suspension fan has the advantages of few components and small volume; due to the adopted magnetic suspension bearing, the fan is longer in service life, and simple and compact in structure, and therefore, the gap of a high-speed magnetic suspension fan in China is supplied.