Rotary vane type electric vacuum pump with heat dissipation function

The invention discloses a rotary vane type electric vacuum pump with a heat dissipation function. The rotary vane type electric vacuum pump comprises a vacuum pump assembly and a heat dissipation fan; the vacuum pump assembly comprises a motor, a pump cavity and an upper cover, and the upper cover covers the pump cavity and is fixed to a flange of the motor through screws; the heat dissipation fan comprises a support and heat dissipation blades, the support is provided with a plurality of hollow pipes extending downwards, a plurality of air channels communicating with the hollow pipes are further arranged in the support, outlets of the air channels are aligned to the heat dissipation blades, and internal threads or sealing fastening nuts are arranged at the lower ends of the hollow pipes. A plurality of hollow bolts penetrate through the through holes of the upper cover from bottom to top and are screwed into the internal threads or the sealing fastening nuts at the lower ends of the hollow pipes, so that the