The present disclosure discloses an imaging lens assembly. The imaging lens assembly includes sequentially, from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens has a positive refractive power, an object-side surface of the first lens is a convex surface, and an image-side surface of the first lens is a convex surface; the second lens has a negative refractive power; the third lens has a positive refractive power, an object-side surface of the third lens is a convex surface, and an image-side surface of the third lens is a convex surface; the fourth lens has a positive refractive power; and the fifth lens has a negative refractive power, and a surface tilt angle β5 of an object-side surface of the fifth lens at a maximum effective radius satisfies: −20°