The invention belongs to the field of carbon materials, and discloses a preparation method and product of red blood cell-shaped hollow carbon. The preparation method comprises the following steps: (a)adding an initiator to a solvent, stirring evenly, then adding acetylacetonate to be stirred and dissolved to form a uniform solution; (b) adding a pyrrole monomer to the obtained solution, cleaningand drying a solid polypyrrole generated in the reaction; (c) heating and keeping the temperature of the dried polypyrrole in the presence of one or a combination of nitrogen, argon, argon-hydrogen, ammonia, H2S, or PH3 to obtain the desired red blood cell-shaped hollow carbon after cooling. The invention also provides an electrode sheet and a secondary battery prepared from the red blood cell-shaped hollow carbon prepared by the preparation method. Through the invention, the obtained carbon material can be prepared in a large scale and is low in price, the secondary battery has high specificcapacity, good cyclic stability, and very broad application prospects.