The invention relates to a movable and dust proof outdoor FTU placement cabinet and an application method thereof, and belongs to the technical field of distribution switch monitoring terminals. The technical scheme includes as follows: the upper end of a placement shell (1) is provided with an opening; electric pushing rods (2) are symmetrically embedded in the sidewalls on the two sides; the upper ends of the output ends of the electric pushing rods are provided with a sleeve (3); the upper part of the sleeve is movably provided with an upper cover body (8); the sleeve (3) can move up and down in the upper cover body (8); the internal of the shell (1) communicates with the internal of the sleeve; an upper protective cover (6) is arranged above the upper cover body (8); the bottoms of twothreaded rods (4) are symmetrically and rotatably arranged at the bottom inside the placement shell (1); and the top ends of the two threaded rods (4) are rotatable connected to the bottom of the upper protective cover (6) after protruding the upper cover body (8). The cabinet can reduce dust, flies, insects and rats to enter the placement shell, and the cabinet can prevent sand while effectivelycooling; and the cabinet is simpler in placement and later maintenance and more flexible in operation.