The invention provides water glass slurry for grouting on a mine working surface, wherein, the slurry takes ethylene acetate as a curing agent and water glass as a main agent; and 100 parts of slurry comprises the following components by volume ratio: 15-60 parts of the water glass 38 Be', 1-10 parts of the ethylene acetate and water. In the invention, the water-soluble ethylene acetate is taken as the curing agent; and the obtained grouting material has the advantages of low viscosity, high permeability, adjustable gelling time, simple components, non-corrosiveness and the like. The water glass slurry can be applied to the fields such as anti-seepage for hydraulic engineering, water plugging for a mine and the like, and the slurry especially has good application prospect on water blocking with grout for the working surface of an underground microfracture stratum and a porosity stratum.