Epoxy glass grid cloth is widely used in packing pouring dry type transformer, reactor and other products. It is combined with epoxy resin pouring coil tightly, just as the reinforced concrete frame, preventing the casting parts from coil external insulation grid cloth layer cracking resulted from cold and heat effect and the large electric power caused by sudden short circuit. It greatly improved the whole mechanical strength of the coil, and compared with chopped glass fiber it is harmless to human health. It is an ideal environmental protection insulation grid cloth material, and has been widely used in the western developed countries. It is also the preferred bedding grid cloth material for epoxy cast dry-type transformer manufacturers in China.