The invention relates to a water cooling system of production equipment. The water cooling system is characterized in comprising a refrigerator unit, a heat exchange, a water tank, a cooling tower circulation pipe loop and an equipment cooling circulation pipe loop, which are connected through pipes. Functional valves are arranged in the pipes to control the opening and closing of the pipes. The refrigerator unit and the heat exchanger are parallelly connected through a pipe. Cooling end pipes of the refrigerator unit and the heat exchanger are communicated with the water tank through a waterinlet pipe and a water outlet pipe. A water inlet pipe and a water outlet pipe of the equipment cooling circulation pipe loop are communicated with the water tank. The cooling system of production equipment can simply use the heat exchanger as a cooling source for cooling the production equipment in winder and other time when the outdoor temperature is lower, so as to save large amount of energy for the refrigerator unit; moreover, because the water tank is arranged, the cooling system can reduce impact of fluctuation of water temperature on the refrigerator unit and the production equipment and the failure rate of the refrigerator unit and the production equipment and improve the service life of the refrigerator unit and the production equipment.