The invention discloses an optical imaging lens group, comprising five lenses of refractive power which consist of a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence from an object side to an image side, wherein the first lens has positive refractive power, and the surface of the object side of the first lens adopts a convex surface; the second lens has negative refractive power; the third lens has negative refractive power; the fourth lens has negative refractive power, and at least one of the surfaces of the object side and the image side of the fourth lens adopts a non-spherical surface; and the surface of the image side of the fifth lens adopts a concave surface, at least one of the surfaces of the object side and the image side of the fifth lens adopts the non-spherical surface, and the fifth lens is made of plastic. With the configuration mode of the optical imaging lens group, the sensitivity of the optical system and the lens size can be reduced, aberration and astigmatism of the system can be effectively corrected, and resolving power with high quality can be obtained.