The invention relates to the field of optical lenses, and discloses a camera optical lens. The camera optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens anda sixth lens in sequence from the object side to the image side. The second lens has positive refractive power. The third lens has negative refractive power. f1/f is between 0.1 and 10. n4 is between1.7 and 2.2. d7/TTL is between 0.01 and 0.2. The camera optical lens has the advantages of high imaging performance and low TTL.