The utility model provides a ground connection downlead hoist mechanism for promote the ground connection downlead with locking mechanism's girder cooperation, the girder is formed with along the T type groove that its length direction extends, its characterized in that: T type spare in the T type groove of can packing into, with T type spare articulated handle, hinge the promotion that can catch on ground connection downlead installation department on the handle and collude, set the operating handle upswing to, can make promote collude do from down upwards, from outer inward action.