Building facade aluminum square tube fixing device

The utility model discloses a building facade aluminum square tube fixing device which comprises a concrete structure, an n-shaped frame is arranged below the concrete structure, and the left side and the right side of the n-shaped frame are connected with the concrete structure through first threaded rods respectively. The left-right symmetrical positions of the inner bottom face of the n-shaped frame are connected with the concrete structure through second threaded rods correspondingly, first nuts are arranged on the first threaded rods and the second threaded rods and located on the bottom face of the n-shaped frame correspondingly, and a limiting base is arranged in the middle of the inner bottom face of the n-shaped frame and located between the second threaded rods. The utility model relates to a building facade aluminum square tube fixing device, which belongs to the field of aluminum square tube fixing, can be conveniently and quickly mounted and dismounted through the mutual matching use of a connect