A camera optical lens includes, from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. At least one of the first lens to the eighth lens has a free-form surface, and the camera optical lens satisfies: −7.50≤f2/f6≤−1.50; and −6.00≤R1/R2≤−0.18, where f2 denotes a focal length of the second lens, f6 denotes a focal length of the sixth lens, R1 denotes a curvature radius of an object-side surface of the first lens, and R2 denotes a curvature radius of an image-side surface of the first lens. The camera optical lens has good optical performance, as well as a large aperture, ultra-thinness and a wide angle.