The invention discloses a manganese-dioxide conducting polymer composite electrode material with a core-shell structure. The manganese-dioxide conducting polymer composite electrode material adopts a manganese-dioxide nano material as a core, adopts conducting polymer as a shell and is a composite nano material with the core-shell structure; the manganese-dioxide nano material is nano balls, nano rods, nano wires or nano tubes; and polyaniline, polypyrrole, polythiophene or poly(3,4-ethylenedioxythiophene) is used as the conducting polymer of the shell, the mass fraction of the manganese dioxide in the composite material is 5-95%, and the mass fraction of the conducting high polymer is 95-5%. The manganese-dioxide conducting polymer composite electrode material disclosed by the invention has the advantages that due to the conducting polymer component, the conductivity of the composite material is increased, and the migration rate of electrons in the charging and discharging process are accelerated, so that the specific capacitance of the composite electrode material is increased; the nano manganese dioxide plays a role in a skeleton, so that the damage of the microstructure of the conducting polymer in the charging and discharging process is avoided, and the cyclic life of the electrode material is greatly prolonged; and the conducting polymer and the nano manganese dioxide both play roles in storing charges. The invention discloses a manufacturing method of the electrode material.