The invention relates to a polypyrrole/cadmium sulfide coaxial nano tubular material and a preparation method of the polypyrrole/cadmium sulfide coaxial nano tubular material. The polypyrrole/cadmium sulfide coaxial nano tubular material is characterized in that the outer layer is functional polymer material polypyrrole, the inner layer is crystalline semiconductor material cadmium sulfide, and the diameter of the material ranges from 200nm to 300nm. A porous AAO template serves as an auxiliary condition, different deposition parameters are adjusted and controlled through a two-step electrochemical method, the structure of the coaxial material is controlled, the problem that two-phase materials need to be matched in the prior preparation method is solved, and the complexity of the preparation process is reduced effectively.