Optical lens capable of temperature compensation

The utility model discloses an optical lens capable of temperature compensation. The optical lens comprises a lens shell, and first to fourth lenses made of optical glass and/or optical resin are successively arranged from the object part to the image part in the lens shell. The first lens is a straw-hat-shaped lens with negative focal power, the second lens is a bi-convex lens with positive focal power, the third lens is also a bi-convex lens with positive focal power, and the fourth lens is a bi-concave lens with negative focal power. A diaphragm element is arranged between the first and second lenses, and the fourth lens is optically connected with a color filter. The wave bands of visible light and near infrared rays introduced by the optical lens are focuses in the same focal plane to enable clear imaging in both day and night modes.