The invention discloses a hook wind bracing, and relates to the field of wind bracing structures. The wind bracing comprises a sliding rail, a left sliding block and a right sliding block are arrangedon the sliding rail in a sliding mode, a long connecting rod is riveted to the left sliding block, the upper end of the long connecting rod is riveted to a supporting rod, the middle of the long connecting rod is hinged to a short connecting rod, the end, hinged to the short connecting rod, of the long connecting rod is higher than the end, riveted to the left sliding block, of the long connecting rod, a containing cavity capable of containing the short connecting rod is formed below the end, hinged to the short connecting rod, of the long connecting rod, and the lower end of the short connecting rod is riveted to the right sliding block. According to the wind bracing, the structure is simple and reliable, the left sliding block and the right sliding block are arranged on the sliding rail, and the distance between the left sliding block and the right sliding block is adjusted so that the opening angle of a window sash can be adjusted and controlled, and the opening angle of the windowsash can be flexibly adjusted and controlled; and the containing cavity is formed in the long connecting rod so that unsmooth opening or abrasion caused by hardware extrusion among the supporting rod, the long connecting rod and the short connecting rod can be avoided.