In order to achieve efficient and clean utilization of energy, Co-firing characteristics of different types of coal (blue-coal, datong anthracite) and biomass (rice husks, tobacco stem and corn cob) and their mixtures were studied using thermogravimetric analysis. The influence of the pretreatment、biomass types、bio-blending ratio and heating rate on ignition temperature, burnout temperature, comprehensive combustion characteristics and kinetic property of the blends were investigated. The results show that，Compared with burning coal only, the ignition and burnout temperature of the coal-biomass blends decreased, indicating the combustion characteristics of the coal were enhanced. The combustion curves of pretreatment blue-coal move towards higher temperature zone, The presence of alkali metal exerts catalytic effect on fuel pyrolysis and combustion behaviors. With the increasing rice husks blending ratio, the co-combustion performance was improved further, the activation energy of the blended fuel reduce. As the heating rate increased, the blending of coal and biomass moved towards the high temperature zone.The comprehensive combustion characteristic index increased, the activation energy of the blended fuel reduce. The 30% rice husk and the 70% blue-coal blended fuel produced a synergistic effect at a heating rate of 20°C/min. The experimental results provide reference and theoretical basis for the application of coal and biomass co-firing in the thermal power generation industry.