The invention discloses an inorganic waterproof patching material. The inorganic waterproof patching material is prepared from the following raw materials in percentage by weight of 76.6-84% of a gelled material, 1.5-2.5% of hydroxyethyl cellulose, 4.2-5% of redispersable emulsion powder, 2.5-3% of a styrene-acrylic emulsion, 1.2-3% of dipropylene glycol ethyl ether, 0.8-1.2% of a modifying agent, 1-1.5% of quick lime, 4-6% of sodium alcohol ether sulphate, and 0.8-1.2% of a water reducing agent. The inorganic waterproof patching material disclosed by the invention has the characteristics of being high in coagulating speed, and good in patching effect, and can be widely used in waterproof projects for building layers, kitchens, toilets, basements and the like.