The invention discloses a fan type asynchronous variable frequency speed regulation motor which comprises a shell, an outer stator assembly, an inner rotor assembly, a frequency converter which supplies power to the outer stator assembly and a cooling speed regulation mechanism. The motor is characterized in that the outer stator assembly is fixedly arranged in the shell, the inner rotor assembly includes a rotor, multiple guide columns which are evenly distributed along a rotor axis and pass through the rotor, and an output disk which is connected to guide axis end parts and is used for outputting power of the rotor outward, wherein at least one guide column is screw rod which is matched with the rotor through a thread and can rotate to drive the rotor to move back and forth along an axial direction, the cooling speed regulation mechanism comprises a fan shaft which extends into the shell from the outer side of the shell and fan blades fixed to a fan shaft, and the rotor transmits power to the fan shaft through a planetary gear mechanism. The motor has a good cooling effect, and the principle of weak magnetic speed regulation can be used to carry out speed regulation.