Abstract: This paper aimed to characteristic of micromachining weak force moment in the fuse circuit that control of catch fire,and by making use of micro channel and gel fiber made chemical energy change into mechanical energy,designed a new kind of MEMS micromachining.This kind of micromachining had electropolar board could move relatively by making use of electrostatic force overcoming the machinery elastic force,control the conduction of the circuit;made use of retractile force of the fibrous gel to free-form circuit safety and then achieved the aim of turn on and turn off.The paper also took the micromachining structure into ANSYS simulated,proved its feasibility and optimized its structural parameter.The maximal characteristic of this kind of new type micromachining is that it’s power consumption is small,comparing with the current device it has made use of gel fiber makes it consume very few the energy and has very high of mechanical efficiency.