讨论了消失模涂料的作用和特点。消失模涂料既要求高的强度，又要求高的透气性。经浇注试验得出消失模铸钢涂料合适的强度范围是３０～６０ｋＰａ，透气性范围是２．５～６．０ｃｍ４／（ｇｍｉｎ），为研制涂料提供了依据。研究了影响涂料强度和透气性的因素，提出保证高强度和高透气性涂料的途径是加入有机和无机粘结剂，合理选择耐火材料的种类及粒度 Discuss the function and characteristics of lost foam coating. Lost mold coating requires both high strength and high breathability. The pouring test shows that the suitable strength range of the LFC steel coating is 30 ~ 60kPa and the air permeability range is 2.5 ~ 6.0cm4 / (gmin), which provides the basis for the development of coatings. The factors influencing paint strength and air permeability were studied. The way to ensure high strength and high air permeability coatings was to add organic and inorganic binders. The type and particle size of refractory materials