The utility model relates to a logic control and the safety protection field of magnetic confinement controlled nuclear fusion device specifically disclose a fusion facility PLC ( logic control ware able to programme) cluster news shared system, including the PLC cluster that is used for realizing fusion facility logic and emergency control, the PLC cluster is including a plurality of PLC that need sharing news, fusion facility PLC cluster news shared system still include with PLC quantity equals the just switch of one -to -one, every PLC and rather than the correspondence the switch is connected and all the switch connects gradually the cyclization and forms PLC communication looped netowrk, every PLC all connects a host computer. The utility model discloses can solve signal line that communication mode that current PLC cluster adopted copper cable signal line lug connection brought and in large quantitiesly, unable know the fine -detail information, unablely realize point -to -area communication, a series of problem of expansibility subalternation, and then provide the news shared system that to overcome the PLC cluster of aforementioned problem.