The utility model discloses a baffle for construction, including baffle body (1), the thickness of baffle body (1) lower part be greater than the thickness on upper portion, the top of baffle body (1)be provided with handle (2), the both sides of baffle body (1) set up two vertical arch (3), arch (3) on paste and have the reflective membrane, baffle body (1) around each division of surface department have supported hole (4) of a downward sloping. The beneficial effects of the utility model are that: this application is through setting up the supported hole, in the bracing piece that can adoptone end and ground contact inserts the supported hole, plays the effect of support to the baffle body, can effectual solution leads to the problem that the baffle emptys because ground flatness is poor.