A camera optical lens includes first to fourth lenses from an object side to an image side, with first and fourth lenses having negative refractive power, and a third lens having positive refractive power, and satisfies −3.50≤f1/f≤−2.00; 0.55≤f3/f≤0.75; 5.00≤d3/d4≤15.00; 5.00≤d5/d6≤35.00; −20.00≤(R3+R4)/(R3−R4)≤−3.00; and −5.00≤R1/R2≤−2.00, where f, f1, and f3 respectively denote focal lengths of the camera optical lens, the first lens, and the third lens, d3 and d5 respectively denote on-axis thicknesses of second and third lenses, d4 and d6 respectively denote a distance between second and third lenses and a distance between third and fourth lenses, R3 and R4 respectively denote curvature radii of object side and image side surfaces of the second lens, and R1 and R2 denotes curvature radii of object side and image side surfaces of the first lens, thereby having good optical performance while meeting design requirements of a wide angle and ultra-thinness.