Abstract: For problem of low automation degree of current fully-mechanized coal mining face, a design scheme of automatic coal mining control system was proposed, and realization scheme of automatic coal mining control technology of the system was expounded. The system adopts communication mode of dual RS485 buses to upload parameters including position of shearer and status of hydraulic support real-timely to terminal controller through support controller. Centralized control computer displays the parameters from the terminal controller. The centralized control computer sends control command to the support controller through the terminal controller in order to realize double closed-loop control of hydraulic support, and also sends control command to shearer controller in order to control ranging arm height of shearer, so as to realize automatic coal mining.