The invention relates to a vehicle laser lamp protecting device. The vehicle laser lamp protecting device comprises a laser light source and a secondary optical component. The blue light wavelength needing to be protected is lambda<0>. A plate glass inner cover is fixedly arranged on the outer side of the secondary optical component. The inner side of a substrate of the plate glass inner cover isplated with a reflecting thin film unit formed by stacking a plurality of layers. The reflecting thin film unit is provided with two layers from inside to outside, the inner layer is a high-refraction-index thin film with the optical thickness being lambda<0>/4, and the outer layer is a low-refraction-index thin film with the optical thickness being lambda<0>/4. The plate glass inner cover comprising the multiple layers of medium thin films is added in front of the secondary light distribution component of the laser light source, so that due to the design of the multiple layers of thin films on a plate, high reflection of the wavelength range from 445 nm to 455 nm of the laser light source can be achieved, blue light is prevented from leaking to the outside, and the safety of pedestrians and a driver is protected.