Fabricated foundation pit dustproof awning device

The invention discloses an assembly type foundation pit dustproof awning device, and relates to the technical field of dustproof awning. The device mainly comprises sliding rail assemblies which are arranged on the two opposite sides of a foundation pit and are parallel to each other, an integrated telescopic and foldable dustproof shed is installed on the two sliding rail assemblies in a sliding mode, the dustproof shed is composed of a plurality of dustproof components which are sequentially connected, every two adjacent dustproof components are detachably connected through bolts, and the dustproof components are detachably connected through bolts. The dustproof component comprises a top dustproof module slidably installed on the sliding rail assembly and side edge dustproof modules installed on the two opposite vertical sides of the top dustproof module, and a spraying mechanism is installed on the inner wall of the dustproof shed. When the dustproof shed is used, according to the length of a foundation pi