The invention relates to a high-specific-capacity three-layer-Mn2O3@MoS2-nanometer-hollow-ball electrode material and a preparing method and application thereof. A three-layer Mn2O3 hollow ball is used as a template, a super-thin MoS2 nanometer sheet grows in situ on the edge of a shell layer in a self-assembling mode with the solvothermal method, a sheet ball structure is formed, and the hollow structure can be still highly kept, namely, a three-layer Mn2O3@MoS2 nanometer hollow ball. The high-specific-capacity three-layer-Mn2O3@MoS2-nanometer-hollow-ball electrode material and the preparingmethod and application thereof have the advantages that compared with other shell-layer Mn2O3 nanometer hollow balls, the three-layer Mn2O3 nanometer hollow ball has the high specific capacitance value, the specific capacitance value of the three-layer Mn2O3@MoS2 nanometer hollow ball after being coated with the super-thin MoS2 nanometer sheet is higher, and the three-layer Mn2O3@MoS2 nanometer hollow ball shows the excellent super-capacitor energy storage performance; the preparing method is simple, the yield is high, the three-layer Mn2O3@MoS2 nanometer hollow ball serves as a super-capacitor electrode material, and has the super-high specific capacitance value, and the cycle life is long.