Abstract: Based on coal mine safety monitoring systems and coal mine power monitoring systems, the paper builds a coal comprehensive safety monitoring system. The system can well solve the problem that the environmental electric locking is bypassed, which greatly improves the safety of coal production. The coal mine comprehensive safety system makes use of the electrical power monitoring system to form the closed-loop control of the electric locking. On one hand, the system can realize electric locking safely and reliably so that it can solve completely the jilt electric blocking problem. On the other hand, it provides environmental protection for the safe and reliable operation of coal mine mechanical and electrical equipments.