The invention relates to an automatic waterproof insulation device for LCD screens. The automatic waterproof insulation device comprises a base plate. A handle is installed at the rear end of the base plate. The base plate is provided with a waterproof insulation mechanism which can play the effect of waterproof insulation. The waterproof insulation mechanism completes the automatic waterproof insulation technology of the LCD screens. By the adoption of the automatic waterproof insulation device, the problems that waterproof materials need to be manually used for conducting waterproof insulation on existing LCD screens in the cleaning process of the LCD screens and the corresponding waterproof materials need to be manually selected to conduct waterproof insulation on the LCD screens of different specifications can be solved, operation is complicated, labor intensity is high and working efficiency is low; and moreover, the waterproof materials cannot be manually arranged evenly, moisture can permeate into liquid crystal equipment easily in the cleaning process of the LCD screens, the liquid crystal equipment can be damaged, and the automatic waterproof insulation function of the LCD screens can be achieved.