Abstract: This paper describes experimental facility and testing methods for the biomass pyrolysis. The effects of temperature and heating rate on the yields and characterization of pyrolysis products have been studied on the basis of the pyrolysis of two typical biomass from agricultural and wood wastes, sawdust and rice hull. The experimental results showed that the regular changes of yields distribution of pyrolysis products from the different types of biomass are similar on the same condition. The significant amount of liquid product can be obtained at the temperature between 400 and 500 ℃. The yields of charcoal reduces as the temperature increases. The pyrolysis gas is medium heating value fuel gas and its heating value ismore than 10MJ/m³ as the temperature is more than 500 ℃. Also, the experimental results indicated that three stages of reaction corresponds to biomasspyrolysis process occurred on the conventional pyrolysis.