The invention discloses a paste fiber coating and a preparation method thereof. Paste fiber coatings are mixed with emulsion, pigments, fillers, defoamers, preservatives, pH regulators, thickeners, dispersants, film-forming aids, co-solvents, fibers and water. The preparation steps are: A. Mix and stir co-solvent, dispersant, defoamer 1, preservative, pH regulator and 80% water, add pigment and filler during the stirring process, and then proceed at a speed of 1500-3500rpm Disperse and grind to prepare a slurry; B, add emulsion and film-forming aids to the slurry in turn, after stirring evenly, add thickener 1 and thickener 2, adjust the viscosity at 115-120KU, and prepare a paint; C. Add fiber to the paint material, stir evenly, then add defoamer 2 and the remaining 20% of water, after defoaming, the product of the present invention is obtained. The invention is used for the decorative coating of the inner wall, and solves the problems of poor stain resistance of the elastic napped coating film, easy cracking and water seepage of the rigid napped coating film, and the like.