A reflective wide-angle lens, having a large aperture and a small projection ratio, the reflective wide-angle lens is used for projecting light from a display element, the reflective wide-angle lens comprising: a front lens group, which is disposed on an optical axis, and the front lens group comprises: a first lens group for receiving light from the display element, the first lens group having a first focal length; a second lens group for receiving light from the first lens group; and a rear lens group comprising a curved mirror for reflecting light passing from the display element through the first lens group and the second lens group, the curved mirror having a second focal length, the absolute value of the ratio of the second focal length to the first focal length is greater than 0.7 and less than 1.3, wherein the distance from the apex of the lens of the first lens group closest to the display element along the optical axis to the apex of the lens of the second lens group furthest from the display element C is defined as a total length of the front lens group, the distance from the apex of the lens of the first lens group closest to the display element C to the center point of the curved mirror in the direction of the optical axis is defined as a total lens length, and the ratio of the total lens length to the total length of the front lens group is greater than 1.8 and less than 2.2, characterized in that the first lens group comprises an aspherical lens, a spherical lens, a triple cemented lens and a spherical lens in this order from the display element to the second lens group, wherein the triple cemented lens comprises two external lenses and a central lens, the two external lenses are negative refraction and the central lens is positive refraction. a first lens group for receiving light from the display element, the first lens group having a first focal length; a second lens group for receiving light from the first lens group; and a rear lens group comprising a curved mirror for reflecting light passing from the display element through the first lens group and the second lens group, the curved mirror having a second focal length, the absolute value of the ratio of the second focal length to the first focal length is greater than 0.7 and less than 1.3, wherein the distance from the apex of the lens of the first lens group closest to the display element along the optical axis to the apex of the lens of the second lens group furthest from the display element C is defined as a total length of the front lens group, the distance from the apex of the lens of the first lens group closest to the display element C to the center point of the curved mirror in the direction of the optical axis is defined as a total lens length, and the ratio of the total lens length to the total length of the front lens group is greater than 1.8 and less than 2.2, characterized in that the first lens group comprises an aspherical lens, a spherical lens, a triple cemented lens and a spherical lens in this order from the display element to the second lens group, wherein the triple cemented lens comprises two external lenses and a central lens, the two external lenses are negative refraction and the central lens is positive refraction.