In order to explore the aging properties resistant to environmental for the composite material applied in power

on the basis of the multi-factor experimental box

we simulated the operating natural environment of the composite poles

observed the changes of material modulus and fiber bragg grating（FBG） strain on the surface of composite material poles and cross-arms under accelerated aging conditions

and analyzed the aging properties of polyurethane（PU）/glass fiber composite material and corresponding composite material poles. After 4 000 h multi-factor accelerated aging test

the retention flexural modulus of PU and PU composite materials were higher than 90%; especially for the samples under pultrusion process

its flexural modulus was up to 95.8% of the intrinsic modulus. The FBG strains of PU composite poles and cross-arms products located on maximum displacement were less than 2 ‰

and the strain of poles was lower than that of the cross-arms. The results show that PU composite pole and cross-arm can keep good resistance to environmental aging.