The invention provides a controllable magnetic connection universal signboard hanging device which comprises a marking frame (1) and a magnet base (2). The marking frame (1) is fixedly connected with the magnet base (2) through a connecting support (3), the connecting support (3) is a universal support, the connecting support (3) comprises an upper support (31) and a lower support (32), and the upper support (31) is connected with the lower support (32) through a control bolt (33). The universal support is adopted by the connecting support of the controllable magnetic universal signboard hanging device, the control bolt is used for adjusting a fastening piece in the upper support and a fastening piece in the lower support, the signboard can rotate at multiple angles, therefore, in the actual use, adjustment is convenient and rapid, and the requirement for multi-angle warning of a signboard is satisfied.