The invention provides a method for preparing carbon hollow sphere composite material carrying tin oxide, relating to a method for preparing a carbon hollow sphere composite material. The invention solves problems of complicated technology and low yield of the existing method for preparing carbon hollow sphere composite material carrying tin oxide. The method comprises the following steps: 1, preparing resorcinol, formaldehyde, sodium carbonate, stannic chloride and water into an aqueous phase solution; 2, preparing normal hexane and Span-80 into an oil phase solution; 3, dropping the aqueous phase solution into the oil phase solution under stirring condition, heating the mixture to 60-85 DEG C and then keeping for 4-48h to obtain a precursor; 4, washing and then drying the precursor; and 5, carrying out heat treatment with nitrogen or argon protection to obtain the carbon hollow sphere composite material carrying tin oxide. The invention has simple technology with carbon hollow sphere yield of 60-80% and can be used as an electrode material for capacitor preparation.