Aluminum alloy formwork suitable for stairs

The utility model relates to the technical field of buildings, and discloses an aluminum alloy formwork suitable for stairs, which comprises a pouring main body, a bottom plate is arranged below the pouring main body, and a fixed formwork, a movable formwork, a movable support frame and a formwork clamp used for clamping and fixing the fixed formwork and the movable formwork are arranged on the bottom plate. The movable formwork and the fixed formwork are moved to be assembled, a cavity capable of being poured is formed between the side formwork and the bottom plate in a matched mode, independent pouring of stairs is achieved, building construction efficiency is improved, and during pouring, through the matched clamping effect of the movable supporting frame, the formwork clamp and the guide fixing rod, the situation that after concrete is poured, the formwork is not prone to falling off is avoided. Due to displacement and even deformation of the movable formwork caused by expansion, the consistency of the ap