Construction fence with sealing structure at bottom

The utility model relates to a construction fence, in particular to a construction fence with a sealing structure at the bottom, which comprises a fence plate, splicing columns, waterproof wedge plates and positioning fastening components, the splicing columns are arranged on two sides of the fence plate, mounting sliding grooves are arranged on two sides of each splicing column, and fixing screws are arranged on two sides of the bottom of each splicing column. A waterproof wedge plate is arranged on one side of the bottom end of the back of the fence plate, and the waterproof wedge plate and the fence plate are in butt joint and fixed through a positioning fastening assembly. By arranging the positioning fastening assembly on the waterproof wedge plate, the waterproof wedge plate can be replaced after the waterproof wedge plate is collided and damaged, so that the sealing performance of the bottom of the construction fence is improved, the situation that water flow in a construction area leaks to affect a ro