The purpose of this paper is to compare the differences between different types of pyrolysis characteristics of biomass straws and explore the impact of different regions on the pyrolysis characteristics of biomass straws. The SDT-Q600 Simultaneous thermal analyzer（TGA）with high purity nitrogen flowing was used for the pyrolysis experiments(the heating rate is 20℃/min, the end temperature is 1000℃) of rape, wheat,corn and rice straw got from Sichuan, Hubei and Yunnan Provinces. The TG curve and DTG curve of the different kinds of biomass straws in different areas were obtained, and then compare and analyzed. The results showed that the pyrolysis process of the 4 kinds of straws showed similar change laws; however, the samples showed differences in the degree of weight loss and weight loss rate according to the different types of components; the region had effects on the degree of weight loss of the same kind of straw, while there is no significant effect on the weight loss rate; the kinetic parameters of the apparent activation energy and frequency factor were obtained with the dynamic calculations of biomass pyrolysis process of different species and areas using Coats-Redfern method. In the main weight loss stage, the activation energy of straw biomass is in the range of 89-144 kJ/mol.