Optical imaging lens

The invention discloses an optical imaging lens, and the optical imaging lens comprises an imaging lens group which is composed of a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from the object side to the image side along the optical axis, and the lenses with the refractive index smaller than 1.65 in the imaging lens group comprise three lenses with positive focal power, the absolute value of the effective focal length of the fifth lens in the imaging lens group is minimum; the plurality of separators comprise a second separator supported on the image side surface of the second lens and a third separator supported on the image side surface of the third lens; the lens barrel is used for accommodating the imaging lens group and the plurality of separators; the maximum height L of the lens cone along the optical axis direction, the effective focal length f of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens