Building video monitoring device

The utility model discloses a building video monitoring device, which comprises a plurality of cameras (1), the plurality of cameras (1) are connected with a monitor through a control host, the building video monitoring device also comprises a support (2) used for fixing the cameras (1), the front end of the support (2) is provided with a rotating shaft (3) for fixing the cameras (1), the outer side of the rotating shaft (3) is provided with an annular glass cover (4), the cameras (1) are arranged in the glass cover (4), and the glass cover (4) is provided with a plurality of cameras (2). A wind-driven rotating mechanism is arranged on the glass cover (4) and is rotationally connected with the rotating shaft (3); the support (2) comprises a cantilever (5), a fixing plate (6) is arranged at the rear end of the cantilever (5), a screw (7) is arranged at the front end of the cantilever (5), a U-shaped frame (8) is arranged at the front end of the cantilever (5), the screw (7) penetrates through a bottom plate of