Drainage system before closing of basement post-cast strip

The utility model discloses a drainage system before closing of a basement post-cast strip, which comprises a water conduit penetrating through the post-cast strip and a water-collecting well, a wire box is reserved at the end part of one end of the water conduit close to the water-collecting well, a flexible material is filled in the wire box, and the end part of one end of the water conduit close to the post-cast strip is temporarily wrapped by an adhesive tape. By the adoption of the system, before the basement post-cast strip is not closed, the originally-designed post-cast strip and the water collecting well are communicated through the water diversion pipe 1, water in the post-cast strip is dewatered through the water collecting well, and then the water and the water are pumped out of the water collecting well together, so that accumulated water of the post-cast strip is drained, the post-cast strip is kept dry before being closed, and direct pouring can be achieved after the post-cast strip is closed i