The invention relates to a writing printing material capable of being repeatedly used, in particular to water writing paper capable of being repeatedly used, and colors develop when the water writing paper encounters water. The water writing paper is composed of a base body material and a color developing component, wherein the color developing component comprises a color developing agent and a color former. The color developing agent is an organic compound or an inorganic compound, which can be alkaline when encountering water, such as an amine compound, an imine compound, a hydroxylamine compound, an amide compound, a hydrazine compound, a nitrogen heterocyclic ring compound, trinitride and an aluminosilicate inorganic polymer. The color former is an acid-base indicator which can generate a chemical reaction under the alkaline condition so as to change the color obviously; when water is removed, the color developing agent and the color former can reversibly restore to the states before reactions, and with the color restores to the initial color, repeated utilization can be achieved. The color developing speed is high, the contrast before and after color developing is high, and different colors can develop with adoption of different color formers.