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The invention discloses an outer handle mechanism of an upward-downward opening type emergency exit. A handle shaft is hinged to an outer handle main structure member; a driving crank is fixedly connected to the handle shaft; a crank locking hook is hinged to the outer handle main structure member; the driving crank interacts with the crank locking hook; one end of a connecting rod is connected with the crank locking hook, and the other end of the connecting rod is connected with one end of a crank, the crank is hinged to the outer handle main structure member, and the other end of the crank is connected with the inner side of a secondary turnover plate through an inserting lug connecting rod; the secondary turnover plate is hinged to a primary turnover plate, the primary turnover plate and the secondary turnover plate are kept in relative fixed positions in the hinged position through two torsional springs I; the secondary turnover plate is connected with the outer handle main structure member through two extension springs; and the primary turnover plate is hinged to the outer handle main structure member, and a relative fixed position relation between the primary turnover plate and the outer handle main structure member is kept in the hinged position through two torsional springs II. The problems that in the prior art, the mechanism complexity is high, the weight is high, the functions are incomplete, and the reliability is relatively low are solved.