The invention discloses an impregnation liquid, a method for quickly preparing transparent paper from the impregnation liquid and the application of the prepared transparent paper. The impregnation liquid disclosed by the invention is prepared from a transparent reagent, a transparent adjuvant, a surfactant, a water repellent agent, a lubricating agent and a crosslinking agent. The method for preparing the transparent paper from the impregnation liquid comprises the following steps: (1) placing raw paper into the impregnation liquid for impregnation, taking out the raw paper, and closely fitting the body paper between two thin film materials, so as to form an impregnated/thin film composite material; (2) squeezing out the redundant impregnation liquid from the impregnated/thin film composite material, drying the composite material, stripping off the thin film material, and further performing burnishing treatment on the paper, so as to obtain the transparent paper. According to the method, the raw materials of the impregnation liquid are simple, wide in source and easy to prepare. The preparation method disclosed by the invention has the advantages of simple process and easiness in industrial production. The paper prepared through the preparation method is high in transparency and excellent in tensile strength and smoothness and can be applied to the field of electronic devices.