The utility model discloses a composite insulation cross arm convenient to install and fix, which relates to the field of
power transmission engineering and comprises a cross arm body, fittings are fixed at two ends of the cross arm body, a fixing sleeve is connected to the outer ring of the middle of the cross arm body, one side of each fitting is provided with a through groove, the top end of each fitting is provided with an
insertion hole, and the through grooves are communicated with the through grooves. In actual operation of the wiring terminal, the wiring terminal can support a wire, and the height of the wiring terminal for supporting the wire can be changed by adjusting the length of the
threaded rod extending into the through groove according to needs, so that actual installation is facilitated, and the wiring terminal is convenient to use. The fixing nut plays a role in fixing the position of the
threaded rod, meanwhile, the wind whistle in the through hole can give out sound when encountering
wind power, birds can be disturbed, the birds are prevented from standing on the cross arm body, the
threaded rod can conveniently enter the through groove, the height of the cross arm is adjusted, and meanwhile
wind power can conveniently enter the through groove.