Adjustable building curtain wall anti-falling device

The utility model relates to the technical field of building curtain wall falling prevention, and discloses an adjustable building curtain wall falling prevention device which comprises a supporting wall plate, a placement limiting device is arranged on the front face of the supporting wall plate, a curtain wall plate piece is arranged on the top of the placement limiting device, a connecting device is arranged on the top of the front face of the supporting wall plate, and the curtain wall plate piece is arranged on the connecting device. The placing limiting device comprises a placing U-shaped plate, a side end connecting plate, a first gear, a second gear, an inner connecting shaft rod, a connecting frame, a pressing plate, a mounting bolt and a driving stepping motor. The placing U-shaped plate is fixedly connected to the front face of the supporting wall plate. According to the adjustable building curtain wall anti-falling device, the placement limiting device is arranged, and a rubber anti-skid pad on th