Isothermal and kinetic experiments have been performed using a micro-fluidized bed reactor to obtain kinetic parameters for the oxidative thermal decomposition of biomass materials (herb residue) with different oxygen concentrations (5, 10 and 20 vol.%) in the inlet gas stream. The kinetic parameters were calculated by Friedman-Reich-Levi (FRL) method and universal integral method. The releasing characteristics of CO, CO2 and H-2 were significant affected by the oxygen concentration. The time for complete releasing the gas components was shorted with increasing temperature and oxygen concentration. An increase in activation energy for forming CO and CO2 was observed at higher oxygen concentration, while the activation energy values of H-2 decreased. All the activation energies obtained under oxidative atmosphere were higher compared with that under inert environment. (C) 2015 Elsevier Ltd. All rights reserved.