Connecting back frame for installing LED display screen module

The utility model discloses a connecting back frame for installing an LED display screen module, and relates to the technical field of LED display screen installing back frames, the connecting back frame comprises a cross beam and a vertical beam, the cross beam is fixedly connected to the rear side of the vertical beam, the LED display screen module is fixed to the front side of the vertical beam through a connecting piece, and the connecting piece is composed of a limiting piece and a supporting piece. A T-shaped groove is formed in the front side of the vertical beam; the supporting piece comprises an L-shaped limiting plate, the side, away from the vertical beam, of the L-shaped limiting plate is fixedly connected with a limiting block, and the L-shaped limiting plate is fixedly connected with the vertical beam through a bolt. The limiting piece comprises a first fixing block, and a limiting hole matched with the limiting block is formed in the middle of the first fixing block; the sides, away from the ve