The invention discloses a centralized control system for coal mine belt conveyors. The centralized control system is characterized by comprising a primary control station above a well, a control operation platform connected with the primary control station and a plurality of downhole secondary control stations. A monitoring system is disposed in each secondary control station. The primary control station is further connected with an upper computer. The primary control station is connected with the secondary control stations through the Ethernet. Relays are disposed among the secondary control stations. The centralized control system has the advantages that the centralized control system integrated with monitoring and controlling is high in automation level, high in monitoring capability, high in safety, and the like; compared with single-chip microcomputer control, the centralized control system is simple in programming, easy to master, and high in anti-interference capability; a variable-frequency speed regulating device in a control motor is excellent in control and speed regulating performance, efficient, easy to maintain, and the like as compared with a hydraulic coupler in the control motor.