An camera optical lens is disclosed. The camera optical lens includes, in sequence from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. A focal length of the first lens is f1, an Abbe number of the first lens is v1, a focal length of the second lens is f2, an Abbe number of the second lens is v2, a curvature radius of an object side of the second lens is R3, a curvature radius of an image side of the second lens is R4, an on-axis distance from an image side of the first lens to the object side of the second lens is d2, a total optical length of the camera optical lens is TTL, and the following conditions are satisfied: −15.0≤f2/f1≤−4.9, 25.0≤TTL/d2≤47.0, 3.0≤v1/v2≤7.0, and 6.0≤(R3+R4)/(R3−R4)≤20.0.