The invention discloses a rotating base of an industrial robot. The rotating base of the industrial robot comprises a fixing seat, a supporting seat, a clamping groove, buckles, a water tank, a wateroutlet pipe, a water inlet pipe, a clamping hole, a supporting frame, balls, a rotating shaft, a bearing, a sliding groove, vent holes, a fixed base plate, bolts, a water pump, a cooling pipe, a ventilation groove, a motor, an exhaust fan and a guide pipe. The rotating base of the industrial robot has the beneficial effects that the water pump is arranged in the water tank, the water pump is connected with the cooling pipe through the water inlet pipe, so that the water pump can be used for pumping cooling liquid in the water tank into the cooling pipe, the cooling pipe tightly attached to theouter wall of the clamping groove is used for cooling the clamping groove, and it can be avoided that high heat energy generated by long-time work damages electric appliance components; the exhaust fan is arranged in the fixing seat, so that external air can be sucked through the exhaust fan and enters the clamping groove through the vent holes and the ventilation groove, and upwards moving airflow blows waste clamped into a gap between the clamping groove and a robot body out.