Abstract: In order to understand the impact of carbonization temperature on the properties of Caragana korshinskii Kom biochars,Caragana korshinskii Kom were charred to make biochars in the temperature of 300,400,500 and 600℃（carbonization for 1 h）.The basis characteristics of biochars,such as char yield of biochars,industrial components and specific surface area,were measured.The compositions of biochars were analyzed via infrared spectroscopy and elemental analysis,the pore structure analysis of biochars was performed based on cryogenic nitrogen adsorption.Moreover,the pore fractal dimension was calculated with the FHH model.The research results show that with the increase of carbonization temperature,the char yield volatile component and carbon content of biochars gradually increase gradually,the polarity weakenes,the aromaticity increases,the industrial components such as fixed carbon and ash content continuously increase.The specific surface area and total pore volume of biochars gradually increase from 1.2903 m~2/g and 0.0045 cm~3/g to 146.5849 m~2/g and 0.1030 cm~3/g,respectively,when the carbonization temperature raised from 300℃to 600℃.In addition,the surface functional groups of biochars decreased gradually with the increase of carbonization temperature.The fractal dimension D of biochars charred at different temperatures satisfies 2≤D≤3,which can well represent the complexity and inhomogeneity of its pore structure.