Installation support and display device composed of installation support

The utility model discloses an installation support and a display device composed of the installation support. The installation support comprises an upper and lower view angle adjusting structure, a lifting adjusting structure, a left and right rotation adjusting structure, wherein the upper and lower view angle is used for adjusting an upper view angle and a lower view angle, the lifting adjusting structure is used for adjusting lifting positions, and the left and right rotation adjusting structure is used for achieving left and right rotation. For example, the upper and lower view angle adjusting structure comprises at least one of a gear, a ratchet wheel and a bayonet so as to adjust the upper view angle and the lower view angle. The lifting adjusting structure comprises a fastening structure of an extension shaft and a sleeve, a lead screw nut structure or at least one of a gear and a rack structure so as to adjusting the lifting positions, and the left and right rotation adjusting structure comprises at least one of a bearing, a gear and a spherical universal connector so as to achieve the left and right rotation. The installation support and display device composed of the installation support can achieve flexible view angle adjustment.