TG-DTA-T curves of Chinese fir(Cunninghamia lanceolata)untreated and treatedwith flame-retardants were analyzed by the TG-DAT simultaneous method.ResuIts showedthat weight loss of the wood was reduced and char yield increased in charring phase. The TGcurves were further analyzed by thermokinetic method to obtain thermokinetic pararneters ofdifferent phases during wood pyrolysis,and to build a thermokinetic equation. It was foundthat activation energy in drying phase was reduced and the activation energy in both charringphase and calcining phase was different from different flame-retardants used.