Abstract: The paper introduced design of a control system of mine-used assembled switches,gave structure of software and hardware of the system and its work ways,and introduced design of software of the system and management system of upper computer in details.The control system is based on embedded technology and industrial Ethernet technology,which can realize functions such as running monitoring and control of underground switches,fault protection,network communication,display of running parameters and state and so on.Result of trial operation showed that the system is stable and reliable,and can meet control requirement of mine-used assembled switches.