Vehicle fastener capable of improving corrosion resistance

The utility model discloses a vehicle fastener capable of improving anti-corrosion performance, and particularly relates to the technical field of vehicle fasteners, the vehicle fastener comprises a screw rod, and an anti-corrosion mechanism is arranged at the outer end of the screw rod; the anti-corrosion mechanism comprises a nut, the nut is fixedly arranged at the top end of the screw rod, a first trapezoidal groove is formed in the nut, a first trapezoidal gasket is arranged at the bottom of the nut, the outer end of the screw rod is sleeved with the first trapezoidal gasket, and the first trapezoidal gasket is arranged in the first trapezoidal groove; a second trapezoidal gasket is arranged at the bottom of the first trapezoidal gasket and arranged at the outer end of the screw in a sleeving mode, a nut is arranged at the bottom of the second trapezoidal gasket, a second trapezoidal groove is formed in the nut, and the nut is connected with the screw through threads. The trapezoidal steps of the first tr