A camera optical lens includes a first lens to a sixth lens. The camera optical lens satisfies: 6.50≤f3/f≤10.00; 1.50≤(R3+R4)/(R3−R4)≤3.00; 8.00≤d1/d2≤10.50; 1.50≤d8/d7≤2.00, where f denotes a focal length of the camera optical lens, f3 denotes a focal length of a third lens, R3 and R4 respectively denotes curvature radiuses of an object side surface and an image side surface of a second lens, d1 denotes an on-axis thickness of the first lens, d2 denotes an on-axis distance from an image side surface of the first lens to an object side surface of the second lens, d7 denotes an on-axis thickness of a fourth lens, and d8 denotes an on-axis distance from an image side surface of the fourth lens to an object side surface of a fifth lens. The camera optical lens has a good optical performance and meets the design requirements for a large aperture, a wide angle and ultra-thinning.