This type of costing resin vacuum interrupter is epoxy resin envelope, silicon liquid latex and Cu-Cr contact interrupter with long creepage distance and cup-shaped contact holder adoping axial magneric field intended to install in the accordant indoor and outdoor vacuum circuit-breaker or other vacuum distribution devices. It is especially used in the electric power, mechanical, chemical and metallurgical departments as well as mines and other industrial departments where it is operated frequently. The small sized interrupter is noted for its compact design, large switching capacity and high insulating level.