The invention discloses an energy-saving motor withefficient heat dissipation, and belongs to the technical field of energy-saving motors. The energy-saving motor comprises a motor assembly, the outer side wall of the motor assembly is sleeved with a cooling mechanism, the outer side wall of the cooling mechanism is sleeved with a motor shell, one side of the motor shell is movably connected with a cover plate through a limiting mechanism, a shaft cooling mechanism is embedded in one side of an inner cavity of the cover plate, and the shaft cooling mechanism is sleeved outside the motor assembly. According to the invention, a cooling fan rotates to drive air to circulate in the air cooling row, heat is discharged through the rear side net plate, water liquid in the cooling base can introduce the heat into the shaft cooling base through a communicating pipe at the same time, and therefore heat generated by the motor assembly and a main shaft can be rapidly dissipated through the circulating water liquid; and the interior of the motor assembly is sealed through the sealing seat, so that the situation that dust is accumulated in the motor assembly to affect the heat dissipation efficiency during air circulation is avoided, and the requirement for internal dust isolation can be met while the efficient heat dissipation capacity can be improved.