In order to reduce the risk of flooding in the main and auxiliary shaft bottom of Chensilou Coal Mine, the optimization scheme of double circuit power supply transformation, automatic control system optimization and reasonable allocation of drainage facilities is put forward. Through the field application of double-circuit feed switch, using its automatic switching function, the double-circuit power supply network of the distribution point of the drainage system is realized. The floating ball switch is used to flexibly set the opening sequence of the submersible pump, and the water nest is connected to make the two warehouses standby to each other, so as to realize the joint drainage function of four pumps under abnormal conditions. Practice has proved that the optimization scheme of the bottom hole water nest drainage system is well applied, which ensures the safe and stable operation of the main and auxiliary shaft hoisting system, and has reference and promotion significance.