Lightweight water retaining equipment suitable for underground garage

The utility model relates to light-weight water blocking equipment suitable for an underground garage. The lightweight water retaining equipment suitable for the underground garage comprises a plurality of water retaining bodies, each water retaining body is composed of a base used for making contact with the ground and a water facing plate extending in the vertical direction, and the water facing plates are perpendicular to the bases and fixedly connected with the bases; the left side face of the upstream plate is an upstream face, every two adjacent water blocking bodies are detachably connected through a connecting device, the connecting device comprises a back ridge and a connecting rod which are arranged on the right side face of the upstream plate, and a plurality of connecting holes evenly distributed in the vertical direction of the back ridge are formed in the back ridge. And the connecting rods are inserted into the connecting holes of the back ridges on the two adjacent upstream plates to connect t