A support frame and a display assembly are provided in the present disclosure. The support frame includes a connection frame, a first support plate at a top of the connection frame, and a second support plate and a third support plate respectively at two branches at a bottom of the connection frame. When the display device is on a support plane, the first support plate is connected to a bottom plate of the display device, and the second and the third support plates are connected to the support plane. When the display device is suspended on a suspension wall, the second and the third support plates are connected to a back plate of the display device, and the first support plate is connected to the suspension wall.