Open-close type backdrop system for foundation pit

The invention discloses a foundation pit opening and closing type awning system, which belongs to the technical field of building construction, and adopts the technical scheme that the foundation pit opening and closing type awning system is characterized by comprising rails arranged along two sides above a foundation pit, a plurality of shielding units walking along the rails, and closed fences arranged on the peripheries of all the shielding units, all the shielding units and the closed enclosure can form a closed space; each shielding unit comprises at least one driving frame, at least one driven frame and film cloth connecting all the driving frames and the driven frames, and every two adjacent frame bodies are connected through a limiting piece. The invention has the following beneficial effects: the awning is composed of a plurality of movable shielding units, and can be opened and closed in any area according to site construction conditions, so as to adapt to the requirements of construction steps such