A vehicle-mounted wide-angle lens comprises a first lens of a negative focal power, a second lens of a negative focal power, a third lens of a negative focal power, a fourth lens of a positive focal power, a fifth lens of a negative focal power, a sixth lens of a positive focal power and a seventh lens of a positive focal power successively from the object plane to the image plane; an aperture diaphragm is arranged between the fourth and the fifth lenses; protective glass and an optical filter are configured between the seventh lens and the image plane; the image plane is provided with light reception surfaces of solid shooting components as CCD and CMOS; the first, second and third lenses are falcate lenses which bend towards the image plane; the fifth and sixth lenses are combined into a glued lens, and a gluing side of the glued lens bends towards the image plane; the fourth and fifth lenses are glass lenses of high refractive indexes respectively; and the first, second, third, sixth and seventh lenses are glass lenses of low dispersion.