Subway electric passenger car water cooling circulation control device

The utility model discloses a water-cooling circulation control device for a subway electric passenger car, and belongs to the technical field of water-cooling maintenance systems. Comprising a shell, a switching knob rotationally mounted on the shell and electrically connected to a control circuit, at least three groups of indicator lights linearly mounted at the top of the shell and electrically connected to the control circuit, and at least two groups of start buttons mounted at the top of the shell and electrically connected to the control circuit, the voltage display is arranged at the top of the shell and is electrically connected to the control circuit; the shell is of a hollow structure with the hollow interior. And a control circuit is arranged in the shell. According to the utility model, after the cooling liquid and the water pump motor of a single train are replaced, the cooling liquid and the water pump motor can be cyclically tested in time, residual air can be discharged out of a water pipe, an