Vertical mold for forming prefabricated staircase

The utility model discloses a vertical mould for forming prefabricated stairs, which comprises a horizontally mounted base (1) and a mould body, the mould body is slidably mounted on the base, a series of first connecting holes (9) are arranged on the base along the width direction, and the mould body comprises a bottom mould (3), a rear mould (4) and a front mould (2). A first connecting hole is formed in the base, a second connecting hole matched with the first connecting hole is formed in the bottom die, the bottom die and the base are detachably connected through a connecting piece penetrating through the first connecting hole and the second connecting hole, the rear die is vertically installed on the bottom die, and the front die is vertically installed on the base. A pouring cavity (10) is defined by the bottom molds (3), the rear molds (4) and the front molds (2), and a plurality of bottom molds and a plurality of front molds are arranged according to different types of prefabricated stairs. The base d