polluting the indoor environment has a negative impact on human health. Harmful substances such as formaldehyde in fire retardant coatings will be released into the air during construction and use, thus polluting the indoor environment. Formaldehyde is a harmful substance, and long-term contact will also cause harm to human health. Therefore, in order to ensure the safety of fire retardant coatings, we should choose fire retardant coatings that meet national standards and avoid using fire retardant coatings containing too many harmful substances such as formaldehyde.