Ultra-narrow lens module and vehicle lamp

The ultra-narrow lens module comprises a reflecting mirror and a lens group, the lens group comprises a first lens and a second lens, and the reflecting mirror is provided with a reflecting focus, so that light of a light source is reflected by the reflecting mirror to form parallel light when the light source is arranged at the reflecting focus of the reflecting mirror; the distance between a focus point where the parallel light is focused and the light source is minimum on the cross section of the lens group in the horizontal direction, and the distance between a focus point where the parallel light is focused and the light source is maximum on the cross section of the lens group in the vertical direction. Parallel light can be focused through the first lens and the second lens to form light spots with the width in the horizontal direction larger than the height in the vertical direction. The light focused by the central optical axis can enlarge the irradiation range, the size in the vertical direction can