Abstract: Aiming at the problems of single control mode, frequent start and stop of water pumps, and low automation level in the current underground drainage system in coal mines, based on the application research of intelligent control technology for underground drainage, and combined with the current situation and requirements of multi-level drainage methods in coal mines, a design scheme of mine unattended automatic drainage monitoring system based on PLC control is proposed. The system uses a distributed control structure to achieve adaptive start/stop control for multiple sets of pumps, real-time monitoring of inlet and outlet flow pressure, and valve status monitoring. At the same time, the drainage collaborative control strategy for multiple pump rooms is also designed and optimized. Finally, the functionality and reliability of the system are verified through experimental tests, and the intelligent level of coal mine drainage control is thus effectively improved.