Protective apparatus and aerial work device

A protective apparatus, comprising a bracket and a cover, the upper side of the cover is hinged with the upper side of the bracket, wherein the protective apparatus comprises a pull-down apparatus, the pull-down apparatus comprises a fixed pulley, a movable pulley, a push rod and a pull rope, the fixed pulley is fixed connected to the cover, the movable pulley is located above the fixed pulley, the movable pulley is sliding connected to the cover, the fixed end of the pull rope bypassing the movable pulley is connected to the fixed pulley, the upper end of the push rod is connected to the movable pulley , and the push rod and the movable pulley cause the handle end of the pull rope to hang down under the action of gravity, pull down the handle end of the pull rope to move the cover downwards, after the lower end of the push rod contact the bracket , and push the movable pulley upwards to drive the handle end of the pull rope upwards.