FCGW series of composite insulator dry wall drivepipe is implied to indoor or outdoor power substation with AC power system’s rated voltage lower than 35KV, frequency being 50Hz, it performs electric insulator and mechanic support function for high-voltage conductor when high-voltage conductor crosses through wall or other object of connection to land, the product also is used as insulator and support for 10KV vacuum circuit breaker’s high-voltage entry-exit wire. Especially, it is implied to dirty district for preventing from dirty-flash accident, therefore, it has been the upgraded product for vastly used china wall drivepipe.