The invention discloses a vertical ultra-short focus projector having a vertical housing and an optical projection system located within the housing. The projection lens of the optical projection system is located at a lower position of the housing and has a vertically upward irradiation direction. An aspheric reflector is disposed over the projection lens. A light outlet is arranged above the housing. The light emitted from the projection lens passes through the aspheric reflector and is emitted from the light outlet to be projected. Compared with the prior art, the vertical ultra-short focus projector achieves vertical placement, compact structure, ultra-short focus projection, can project things on a wall when getting close to or hanging on the wall, has a projection ratio of 0.2 and a projection ratio of 0.19, is suitable for narrow venues, temporary display, flexible needs, can be used for projection display in meetings, classrooms, public display spaces, art exhibitions, games, exhibitions, high-end commercial institution, and reception desks.