The present invention relates to an energy-saving luminous advertising device and its installation method, including an advertising frame, a lifting mechanism, an anti-fall cylinder, and a solar lamp module, wherein the advertising frame includes a buried column, a vertical column, a longitudinal column, and a box seat . , the second guide wheel, the third guide wheel, the advertising paste board, etc.; the anti-fall cylinder is set on the advertising frame; the solar lamp module is set on the advertising frame. The overall structural strength of the present invention is very high. When the advertisement needs to be replaced, workers do not need to climb, which can avoid safety accidents, and the replacement of the advertisement cloth is very convenient, and it can prevent the advertisement cloth from being wet, which helps to prolong the life of the advertisement cloth. The service life of the advertising cloth is to maintain a good advertising display effect for a long time; the installation method is very simple and convenient, and can achieve the effect of quick installation.