Abstract: A fire retardant composition comprising the following amounts by weight: blowing type fire-retardant coat base ingredients in an amount of 8-15%, a fire-retardant smoke suppression agent fire retardant agent in an amount of 10-14%, the fire-retardant smoke suppression agent including Antimony (Sb), Boron (B), Zinc (Zn), Magnesium (Mg), Calcium Carbonate (CaCO3) and Phosphorus (P), a dehydration char formation promoting agent in an amount of 8-12%, a fire-retardant smoke suppression curing agent in an amount of 6-8%, a fire-retardant heat absorb expanding agent in an amount of 3-3.5%, a fire and heat resistance base agent in an amount of 11-23.5%, dispersant in an amount of 0.2-0.6%; a defoaming agent in an amount of 0.1-0.2%, a wetting agent in an amount of 0.1-0.2%, a film-forming additive in an amount of 0.1-0.5%;, pigments in an amount of 11-15%; and water in an amount of 22-31%.