The utility model provides a modular device for short -circuit fault current -limiting, including overvoltage protection subassembly, vacuum interrupter and intelligence switch module, vacuum interrupter with behind the intelligence switch serial module with the overvoltage protection subassembly is parallelly connected, the both ends of overvoltage protection subassembly are used for with some current limiting reactor of circuit central plain parallelly connectedly. A modular device for short -circuit fault current -limiting, can have current limiting reactor parallelly connected with circuit central plain, and the unnecessary complete equipment that changes, manufacturing cost is practiced thrift greatly in convenient installation alone and changing, compares with traditional fault current limiting device, need not additionally dispose new current limiting reactor, the energy consumption is little, the speed of action is fast, saves the resource more.