Side face formwork bracing system for post-cast strip of shear wall or floor

The utility model discloses a side face formwork bracing system for a post-cast strip of a shear wall or a floor. The side face formwork bracing system comprises wood braces, timber formworks, opposite pull screw rods and frame tubes, the wood braces, the timber formworks, the opposite pull screw rods and the frame tubes are sequentially fixed to the two sides of the shear wall or the floor in the thickness direction, the frame tubes on the two sides are tensioned through the opposite pull screw rods, and water retaining steel plates are arranged on central planes between the opposite wood braces on the post-cast strip and are parallel to the wood braces. Through grooves are formed in opposite sides of the wood braces on the two sides of the water retaining steel plates in parallel in the width direction of the wood braces, supporting steel angles are symmetrically arranged between the wood braces and the water retaining steel plates, openings of the supporting steel angles face the post-cast strip, one side edge of each supporting steel angle is attached to the corresponding wood brace in a parallel mode, and the other side edge of each supporting steel angle is connected with the corresponding water retaining steel plate and is perpendicular to the corresponding water retaining steel plate. Short steel columns which have different lengths and are arranged in a staggered mode are welded to the two sides of connecting edges of the supporting steel angles and the water retaining steel plates. Steel bars penetrating through the through grooves are fixed in the wood braces through the through grooves, the supporting steel angles and the water retaining steel plates form a whole, the formwork bracing system is formed at a time, and slurry leakage cannot happen; staggered holes are naturally formed after formwork removal through the short steel columns on the supporting steel angles, and the chiseling procedure does not need to be conducted any longer before the post-cast strip is constructed.