The utility model provides a modularized detachable live ammunition shooting square cabin. According to the modularized detachable live ammunition shooting square cabin, two sealing plates are installed on the front face and the back face of a containing frame through fixing bolts, inserting bolts are fixedly connected to the positions, located at the four corners, of the top of the containing frame, and lifting plates are installed at the positions, located at the front face and the back face, of the top of the containing frame through fixing bolts correspondingly; a top cover is mounted at the top of the lifting plate, the lifting plate comprises a mounting plate, mounting openings are formed in the positions, close to the two sides, of the bottom of the mounting plate, movable grooves are formed in the tops of the mounting plates, and telescopic rods are mounted at the positions, close to the two sides, of the bottoms of the inner walls of the movable grooves through fixing pieces. According to the modularized detachable live ammunition shooting square cabin, the flexibility of the square cabin is improved through the structure, the square cabin can be adjusted to the corresponding height according to requirements, the square cabin can be used for different scenes, and later transportation is also facilitated.