Cooling device and cooling method of stranding machine

The invention provides a cooling device and a cooling method of a stranding machine, and belongs to the technical field of metal wire stranding equipment. The cooling device of the stranding machine comprises a machine cover and a cooling assembly. Wherein the hood is used for bearing a rotating shaft assembly of a rotating pay-off system and/or a rotating take-up system of the stranding machine. The cooling assembly is arranged in the machine cover and comprises a water tank, a submersible pump, a circular-arc-shaped heat exchange pipe and a plate heat exchanger, a water outlet of the water tank is connected with an inlet of the submersible pump, the circular-arc-shaped heat exchange pipe is used for being arranged on the outer surface of a bearing seat of the rotating shaft assembly in a sleeving mode, and an outlet of the submersible pump is connected with an inlet in one end of the circular-arc-shaped heat exchange pipe; an outlet at the other end of the arc-shaped heat exchange tube is connected with a w