TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Parameter: The specific surface area of the carbon aerogel ranges from 100-1100 m2/g, while the percent of void is 40-98%, the aperture is 2-50 nm, and the degree of fineness is 200-400 meshes. The metal conducting substrate refers to a stainless steel thin sheet, a 100-400 mesh stainless steel mesh, a nickel thin sheet or foamed nickel. If the polymer is the water solution of the mixture of poly-dioxoethyl thiophene and poly-p-styrenesulfonate, the mass percentage concentration of the prepared carbon aerogel suspension is 5-40%; after the carbon aerogel/polymer suspension composite is prepared, it is dropped onto the conducting substrate and spreader equably through a spin coater, where the rotating speed in spin coating is 500-3000 revolutions/minute, and the time for that is 30 seconds; then it is roasted in an oven for 20-60 minutes at 100-150 degrees C; and after being cooled, the carbon aerogel combined counter electrode for dye-sensitized solar cell can be obtained. If the polymer is polyfluortetraethylene, polyvinylidene fluoride or polyvinylidene fluoride-hexafluoropropylene, the carbon aerogel is added to the polymer suspension according to the mass ratio being 5:1-15:1, and then ethanol or N-methyl-2-pyrrolidone with a volume ratio being 1%-10% to them, to obtain the carbon aerogel/polymer paste composite; the carbon aerogel/polymer paste composite is applied to the conducting substrate through knifing, and then the conducting substrate coated with the composite is dried in a vacuum oven or at the room temperature; and after being dried, it is preformed under 10-20MPa, to obtain the carbon aerogel combined counter electrode for dye-sensitized solar cell. Preferred Component: The polymer refers to mixture of poly-dioxoethyl thiophene and poly-p-styrenesulfonate according to a weight ratio being 1:6, polyfluortetraethylene, polyvinylidene fluoride or polyvinylidene fluoride-hexafluoropropylene. The conducting substrate is tin-indium oxide glass, fluorine-contained stannic oxide glass or metal conducting substrate.