Heat dissipation structure of brushless motor and brushless motor thereof

The invention relates to the field of brushless motors, in particular to a heat dissipation structure of a brushless motor and the brushless motor. The brushless motor comprises a shell, a base, a space ring, a sleeve shell, a top plate, a rotor, a long bolt, a heat dissipation mechanism, an insulator, a cushion cylinder, an iron core, a lower connecting frame, an upper connecting frame, a magnet and an upper connecting plate, the base is arranged at the bottom of the shell, the space ring is arranged at the top of the shell, the sleeve shell is arranged at the top of the space ring, and the top plate is fixedly connected with the top plate. A rotor is arranged in the casing, and a magnet is sleeved on the outer side of the rotor. According to the heat dissipation structure of the brushless motor and the brushless motor provided by the invention, the parts of the whole motor and the shell are fixed and limited through the three long bolts, so that the whole disassembly and maintenance are convenient, the moto