An optical lens (10), a lens module (100), and an electronic device (1000); by means of a catadioptric lens within the optical lens (10) performing axial folding on light entering into the optical lens (10), the optical lens (10) can possess a relatively long focal length, so as to achieve a long distance photography effect, while also allowing the total optical length of the optical lens (10) to be relatively small, thereby not affecting the slim form of the electronic device (1000) when using the optical lens (10) in the electronic device (1000). Also, a prism does not need to be used in the optical lens (10) to achieve optical path folding, and relative to an optical lens where a prism is used to perform optical path folding, the present optical lens (10) has a lower manufacturing precision requirement, lower manufacturing costs, and the optical lens (10) occupies less space in another direction besides the direction of the optical axis.