The invention discloses a coating liquid for sweet-scented osmanthus fragrant cigarette liner. The coating liquid comprises the following raw materials in parts by weight: 10-18 parts of butadiene styrene rubber emulsion, 10-20 parts of inorganic mineral powder, 75-90 parts of water, 0.08-2 parts of ethanol, 0.5-1 part of hydroxy-4,5-dimethylfuran-2-one, 0.01-0.2 part of potassium citrate, 1-2 parts of osmanthus essential oil, 0.05-1 part of 0.1-2% saccharomycetes, 0.05-1 part of 2-8% protease, 0.05-1 part of myristic acid, 0.5-1 part of dihydroactinidiolide, 0.22-0.25 part of a dispersing agent, 0.11-0.13 part of an antifoaming agent, 0.18-0.21 part of a thickening agent, 1-3 parts of PVA-S and 0.8-1.0 part of a lubricating agent. Cigarette liner paper coated with the coating liquid disclosed by the invention can achieve the effects of volatilizing fragrance of sweet-scented osmanthus, increasing scent of cigarettes, reducing the defects of strong cigarette smell, great irritation and bitter aftertaste in the process of smoking the cigarettes, improving the aftertaste comfort and improving the quality.