The invention provides a water-based colored sand self-leveling polyurethane mortar, which can be used as an industrial floor and has excellent properties, such as heavy impact resistance, mechanical heavy load resistance, chemical resistance, etc., and can be used in high temperature and humid environments. The polyurethane mortar of the invention uses colored quartz sand to match the color paste, and the overall coating has sufficient compatibility, which can realize the long-term artistic decoration of the floor. The polyurethane mortar of the present invention adopts modified vegetable oil polyether polyol water dispersion, and diisocyanate, such as diphenylmethane diisocyanate (MDI), and high-performance concrete is cured at the same time, and the colored quartz sand in the system can strengthen The hardness of the coating, the obtained coating is durable and wear-resistant, and has various decorative effects. The polyurethane mortar system of the present invention can also be used for repairing and renovating building entities, or realizing decoration purposes on various substrates, etc.