The invention provides an optical lens which comprises an optical base plate, a black coating layer and an anti-reflecting film. The optical base plate comprises an upper surface and a lower surface opposite to the upper surface. The upper surface of the optical base plate is covered with part of the black coating layer. The upper surface of the black coating layer is covered with at least part of the anti-reflecting film. Compared with the prior art, the black coating layer on the surface of the optical base plate is covered with a layer of anti-reflecting film, Fresnel reflection of the lens is greatly lowered, and accordingly the imaging quality of the lens is improved.