Underground building side wall anti-leakage baffle off-wall ditch structure

The utility model discloses an anti-leakage baffle off-wall ditch structure of a side wall of an underground building. Leakage water is influenced by stratums and seasonal rainfall, overflows the water retaining ridge and permeates underground building decoration skirting lines. An anti-leakage baffle is arranged in a wall separation groove and is of an L-shaped structure, the short edge of the anti-leakage baffle is fixedly connected with the top face of a middle plate, and the long edge of the anti-leakage baffle is fixedly connected with a skirting line. A plurality of anti-leakage baffles are arranged in the length direction of the off-wall groove, and waterproof glue is smeared between the junction surfaces; a supporting steel frame is arranged between the anti-leakage baffle and the outer wall and fixedly connected with the anti-leakage baffle and the outer wall. The anti-leakage baffle is arranged in the off-wall ditch, so that the height of the off-wall ditch is increased, the water discharge amount o