The utility model relates to a wind-proof window hook, which is used for the opening and the positioning of a window sash and can automatically be closed by means of wind force. The utility model is characterized in that a hanging nose is provided with a strip-shaped hole; a supporting rod is hinged by two sections, is folding, and is provided with a ratchet mechanism. The wind-proof window hook solves the problems that the opening angle of the window sash is arbitrary to control ventilation quantity and the window sash realizes self-closing and prevents rain water from flowing into windows and glass from scraping, when wind blows. The utility model can be used for the window installation engineering of buildings.