Abstract: Oxygen index chamber and CONE calorimeter were used to evaluate the fire retarding properties of FRW fireretardant carbonized poplar veneers which were dipped with different consistence. The results showed that: the fireretarding property of FRW fireretardant carbonized poplar veneers which were dipped with more than 8% consistence could reach the first class of JISD 1322-77. The heat release rate （HRR）, total heat release （THR）, smoking ratio （SR） and total smoke production （TSP） of FRW fireretardant carbonized poplar veneers showed the decreasing tendency with the increase of the dipping consistence. The FRW fireretardant carbonized poplar veneer owned the better fireretarding and smoke suppression performance.