Fabricated building hoisting steel beam

The assembly type building hoisting steel beam comprises a cross beam, rectangular plates are connected to the left side and the right side of the cross beam in a clamped mode, an I-shaped plate is transversely and fixedly connected to the center of an inner cavity of each rectangular plate, sliding columns are slidably connected to the top and the bottom of the inner side of each I-shaped plate, and connecting plates are fixedly connected to the surfaces of the sliding columns in a sleeved mode; the top of the right side of the connecting plate is fixedly connected with a clamping plate. Through the arrangement of the I-shaped plate, the sliding column, the connecting plate, the clamping plate and the positioning rod, the clamping plate can be manually adjusted up and down to move to complete spacing adjustment, the clamping plate is separated up and down to drive the connecting plate and the sliding column to move synchronously, the connecting plate is inserted into the positioning rod to limit the connecti