The invention discloses a supercapacitor composite electrode material containing carbon micro-tubes and a preparation method thereof, which is characterized in that the supercapacitor composite electrode material is prepared from the following raw materials in parts by weight: 10 to 20 of poplar catkin, 5 to 10 of P123, 80 to 150 of hydrochloric acid, 20 to 30 of tetraethyl orthosilicate, 5 to 10 of sugar bran, 2 to 3 of sulfuric acid, an appropriate amount of HF, 10 to 15 of ZnCl2 solution, 20 to 40 of ethanol, 2 to 5 of silane coupling agent KH560, 3 to 8 of pyrrole, 15 to 20 of p-toluene sulfonic acid, 15 to 20 of ammonium persulfate solution and 80 to 300 of water; after the mesoporous carbon is activated with ZnCl2, the pore size of the mesoporous carbon increases, the number of mesopores increases, and with the function of the silane coupling agent, the adhesion of a conductive polymer on the mesoporous carbon is facilitated, so that the composite material shows better electrochemical performance; and the larger diameter of the carbon micro-tubes is suitable for ion transport and electrochemical energy storage is facilitated.