Abstract: The present invention provides a reflective wide-angle lens having a large aperture (for example, FNO 1.7) and a small projection ratio (for example, TR?0.2). The reflective wide-angle lens reduces lens size and reduces the number of lenses required while achieving a clear focus on a wide range of screen sizes. The reflective wide-angle lens comprises a front lens group and a rear lens group. The front lens group comprises a first lens group and two second lens group. The rear lens group comprises a curved mirror. The first lens group comprises at least a triple cemented lens, an aspherical lens, and two spherical lenses. The second lens group comprises at least two aspherical lenses and two spherical lenses. The curved mirror is a concave optical symmetric aspheric mirror.