Abstract: Aiming to study and analyze structure and fractal nature of surface and pore of graphite fibers,they were tested and explored by applying field emission scanning electron microscope,inductively coupled plasma-atomic emission spectrometer,and automatic physical adsorption analyzer.The results show that graphite fibers are cylindrical,diameter about 12—18 μm,relatively smooth surface,and fewer defects,which is conducive to gas adsorption.The carbon content of graphite fibers is about 95.86 %,containing a small amount of N,H,O,S and trace amount of Ca,Fe,Mg,Si,Al elements and so on,which the pores left in the production process is not much.Graphite fibers are of larger specific surface area,in which the micropore volume is 97.98 % of the total pore volume with the average pore size in the micropore region.In addition,pore size distributions are relatively narrow,and contain a large number of micropore about 0.84 nm and a small amount of microporous about 1.21 nm,which presents richer micropore structures so that it is equipped with good adsorption properties.surface and pore of graphite fibers have good fractal characteristics,whose fractal dimension are 2.11 and 2.99,respectively,and which are adsorbent materials with excellent industrial prospects.