Building wallboard installation auxiliary device

The utility model discloses a building wallboard installation auxiliary device, and relates to the technical field of building wallboard installation. The building wallboard installation auxiliary device comprises two sets of installation plates, an inclination mechanism and a fixing mechanism. The tilting mechanism is arranged between the two groups of mounting plates and comprises a rotating rod, rotating plates and connecting plates, the connecting plates are fixedly mounted at the bottoms of the mounting plates, the rotating rod is rotatably mounted between the two groups of connecting plates, and two groups of rotating plates are fixedly mounted on the outer wall of the rotating rod. According to the building wallboard installation auxiliary device, a rotating plate can be driven to rotate by controlling starting of a motor, so that an installation cylinder rotates to push a wallboard to incline, the wallboard can be erected conveniently, the wallboard can be placed on the installation plate, a pushing d