The utility model provides a building engineering protection network fixing device, includes protection network frame, connecting rod, I -shaped left side board, screw, I -shaped board, I -shaped right side board, I -shaped right side card slot, goes up the picture peg, goes up picture peg groove, picture peg, I -shaped board left side has I -shaped left side board, the protection network frame isconnected to I -shaped left side board, I -shaped left side board passes through screw connection protection network frame, the screw is in I -shaped left side board bilateral symmetry setting, I -shaped board right side has I -shaped right side board, the connecting rod has I -shaped right side card slot, I -shaped right side board suits with the right card slot of I -shaped, I -shaped right side card slot is connected to I -shaped right side board, picture peg upper portion has last picture peg, I -shaped right side board has last picture peg groove, go up the picture peg and insert the picture peg groove, go up the picture peg and connect upward picture peg groove, the picture peg lower part has lower picture peg, the connecting rod has the underthrust card slot, the picture peg inserts the underthrust card slot down, the underthrust card slot is connected to the picture peg down, the picture peg passes through the bolted connection connecting rod, the picture peg sets up in I -shaped board bilateral symmetry, the I -shaped board sets up in the connecting rod bilateral symmetry.