Dust falling equipment for building construction

The utility model relates to dust falling equipment for building construction, which comprises a base, a portable dust falling mechanism and a mounting and fixing mechanism are arranged at the top end of the base, and the portable dust falling mechanism comprises a vertical rod, a water inlet pipe, a connecting tee joint, a screw plug, a telescopic pipe, a swing support, a swing electric cylinder and an atomizer. When the dust falling equipment for building construction is mounted, the dust falling equipment can be directly and manually carried and moved due to the fact that the dust falling equipment is smaller in size and lighter in weight, after the dust falling equipment moves to a working position, the base can be fixedly mounted at the working position through the mounting and fixing mechanism, and then the water inlet pipe communicates with an external water source; if a plurality of groups of dust falling equipment are communicated together, a screw plug can be screwed off, a water inlet pipe of anoth