Abstract: By using the cone calorimeter and smoke density analyzer, the heat release rate (HRR), total heat release (THR), total smoke release quantity (SPR) and smoke density (TSR) of water-based fire retardant coating added with acid type molybdenum acid copper are analyzed, in order to determine the water-based fire retardant coating with acid type molybdenum acid copper for the delay and inhibitory effect of combustion and smoke, and provide reference for the production and manufacture of railway vehicle water-based fire retardant coating.