A extra -high voltage alternating current -direct current circuit live working is with flexible moisture -resistant insulating stretching strap has been announced to this patent, including stretchingstrap (2) and joint (1), the flexible band form insulator that forms is oozed by multilayer aramid fiber fabric in stretching strap (2) after the liquid silicone rubber solidification through vacuum infiltration, its is structural including multilayer aramid fiber fabric layer (13), silica gel intermediate layer (12) and cladding are in silicone cover (11) of surface, arc draw -in groove (6) thatare provided with connecting hole (3) of connecting tool yoke and connect stretching strap (2) on connecting (1). Provided is an advantage is: be arranged in replacing the insulating pull -rod of theinsulator instrument of changing, instrument light in weight, high altitude installation convenient operation, excellent humidity resistance and high strength, place with the use in can not the moisture absorption, the security performance is excellent.