Wenzhou coastal area is rich in wind resources and has natural advantages in the development of wind power new energy. However, the safe operation of Wenzhou power grid is affected by local strong typhoon, high humidity and high salinity in coastal areas and other adverse climate environment. Bolts and wire fittings fail prematurely in the service process. Therefore, the bolt was treated with laser surface strengthening to improve the wear resistance of the material, and the structure, hardness, wear resistance and impact toughness of the material after laser treatment were analyzed. The results show that the microstructure of laser enhanced layer is acicular and lath martensite with the maximum depth of 1 mm. The wear resistance of laser strengthened bolts is improved obviously. Compared with unstrengthened bolts, the weight loss and wear depth of laser strengthened bolts are decreased by 95.37% and 91.37% respectively. The impact toughness of the unreinforced material is 89 J/cm2, while the impact toughness of the laser reinforced material is slightly reduced to 75 J/cm2. The impact toughness of laser reinforced materials still meets the requirements of relevant standards.