Cooling water automatic control system for coal mine

The utility model provides a cooling water automatic control system for a coal mine, which comprises a controller, a timer, a first passage and a second passage, the first passage enables cooling water to pass through an internal cooling pipe of a motor, the second passage enables the cooling water to pass through an internal cooling pipe of a speed reducer, and the first passage is provided with an electric ball valve for controlling on-off of a waterway. A first channel water inlet is connected with a water source, a first channel water outlet is connected with a second channel water inlet through a series water pipe, a second channel water outlet is connected to a waste water collecting pool, a controller is electrically connected with an electric ball valve, a timer, a motor switch and a speed reducer switch, and the controller controls starting and stopping of cooling water and starting and stopping of a motor through a time sequence. According to the utility model, an automatic valve opening and closing