Three kinds of AC(Amorphous Carbon，AC)/SWCNTs(Single-Walled Carbon Nanotubes，SWCNTs）thin films with different component ratios were prepared by low-pressure premixed flame combustion method with anhydrous ethanol as carbon source，ferrocene as catalyst precursor and thiophene as the growth promoter of carbon nanotube，which was used as a self-supporting negative electrode material to assemble sodium ion battery. The crystal structure，micro morphology and composition of the materials were characterized by X-ray diffraction，transmission electron microscopy，Raman spectroscopy and thermogravimetric analysis，and the electrochemical performances of the anode materials for sodium ion batteries were analyzed by charge-discharge performance tests. The results show that with the increase of catalyst content，the layer spacing of carbon materials gradually increases，the crystallization degree of materials decreases，and the amorphous carbon composition increases，which provides space for the reversible storage of Na+. The composition of the material was analyzed by TG. It is found that when the catalyst content is 0.018 g，the sample(AC/SWCNTs-3）has the largest amorphous carbon content，which is 67.01%. At this time，the carbon layer spacing of the sample is the largest，Na+ is embedded/stripped，and the cross-linked SWCNTs network structure provides channels for electron transmission. As a carrier attached to amorphous carbon，the decline of capacity is delayed and there is the best electrochemical performance. After 60 cycles of rate performance test，AC/SWCNTs-3 shows good reversibility，and the reversible specific capacity reaches 220.7 mAh/g  after 150 cycles at 50 mA/g current density，the electrode can still maintain the specific capacity of 146.7 mAh/g. In addition，the reaction process of sample AC/SWCNTs-3 is a sodium storage mechanism，which is dominated by diffusion control mechanism. At sweep speed of 0.1 mV/s，the capacitive contribution rate is 19.3%. In conclusion，amorphous carbon provides rich active sites in AC/SWCNTs composites，and hollow tubular SWCNTs can be used as channels for rapid electron transmission，ensuring the rapid diffusion and reversible storage of Na+ in the working process of the battery，so that AC/SWCNTs composites show better electrochemical performance in sodium ion batteries.