The invention provides a method of preparing a carbon nano pipe load hydrous ruthenium oxide composite material. First, an electric deposition solution is prepared, and then the carbon nano pipes are spread in the main solution; the ruthenium hydroxide is deposited and loaded on the carbon nano pipes through the electric deposition method, to form the precursor of the carbon nano pipe load hydrous ruthenium oxide composite material; the carbon nano pipes / ruthenium hydroxide settling after the electric deposition are put into a drying box to receive heat treatment, and after natural cooling, the carbon nano pipe load hydrous ruthenium oxide nano powder composite material is obtained. The invention has simple preparing conditions, easy to realize, does not include the complicated technology of re-oxidation treatment after traditional deposition of ruthenium trichloride and alkalinesubstance, so as to prevent introduction of impurity ion, make sure of high purity of products, prevent deficiencies of low output and difficulty in realizng industrialization, can prepare a large amount of carbon nano pipe / hydrous ruthenium oxide compound powder, and helps in industrial large-scale production.