An in-vehicle camera lens, the in-vehicle camera lens sequentially consisting essentially of, from an object side to an image side thereof: a first lens with a negative refractive power, whose object side surface is convex and image side surface is concave; a second lens with a negative refractive power, whose object side surface is concave and image side surface is convex; a third lens with a positive refractive power, whose object side surface and image side surface are both convex; a stop; a fourth lens with a positive refractive power, whose object side surface and image side surface are both convex; a fifth lens with a negative refractive power, whose object side surface is concave surface; wherein the fifth lens and the fourth lens constitute a bonding lens group; a sixth lens with a positive refractive power, whose object side surface is convex; and a filter; wherein the second lens, the third lens, the fourth lens, and the fifth lens are glass spherical lenses; and the first lens and the sixth lens are both glass aspherical lenses; wherein the in-vehicle camera lens satisfies the following expressions: − 1.5 < R 21 / f < − 0.8; R 41 / f < 1.8; f / R 52 < 0.2; where R 21 represents a curvature radius of the object side surface of the second lens; R 41 represents a curvature radius of the object side surface of the fourth lens; R 52 represents a curvature radius of the image side surface of the fifth lens; and f represents a focal length of the in-vehicle camera lens; wherein the in-vehicle camera lens satisfies the following expressions: dn / dt 4 < − 5 × 10 − 6 / ° C; f 4 / f < 1.5; where (dn/dt)4 represents a temperature coefficient of refractive index of the fourth lens; and f 4 represents a focal length of the fourth lens. a first lens with a negative refractive power, whose object side surface is convex and image side surface is concave; a second lens with a negative refractive power, whose object side surface is concave and image side surface is convex; a third lens with a positive refractive power, whose object side surface and image side surface are both convex; a stop; a fourth lens with a positive refractive power, whose object side surface and image side surface are both convex; a fifth lens with a negative refractive power, whose object side surface is concave surface; wherein the fifth lens and the fourth lens constitute a bonding lens group; a sixth lens with a positive refractive power, whose object side surface is convex; and a filter; wherein the second lens, the third lens, the fourth lens, and the fifth lens are glass spherical lenses; and the first lens and the sixth lens are both glass aspherical lenses; wherein the in-vehicle camera lens satisfies the following expressions: − 1.5 < R 21 / f < − 0.8; R 41 / f < 1.8; f / R 52 < 0.2; where R 21 represents a curvature radius of the object side surface of the second lens; R 41 represents a curvature radius of the object side surface of the fourth lens; R 52 represents a curvature radius of the image side surface of the fifth lens; and f represents a focal length of the in-vehicle camera lens; wherein the in-vehicle camera lens satisfies the following expressions: dn / dt 4 < − 5 × 10 − 6 / ° C; f 4 / f < 1.5; where (dn/dt)4 represents a temperature coefficient of refractive index of the fourth lens; and f 4 represents a focal length of the fourth lens.