The invention discloses an inner cavity core tire used for a prefabricated hollow concrete structure. The inner cavity core tire comprises a core tire body formed by connecting a plurality of core tire units. The core tire body is provided with an air charging and discharging component. The core tire units are made of a flexible material. Each core tire unit is internally provided with a through reinforcer placing hole. All the core tire units communicate through air guide pipes or intersegmental connectors. The multiple sets of reinforcer placing holes are formed in a spatial crossing layout mode. Each reinforcer placing hole is internally provided with a reinforcer with two extended ends. The core tire body is provided with a positioning mechanism. According to the inner cavity core tire used for the prefabricated hollow concrete structure, the core tire body made of the flexible material is creatively selected and used as an inner cavity mold for producing the hollow concrete structure, the structure is simple and reliable, and expensive metal materials are saved; and in addition, the reinforcing connection effect of connecting the two sides can be achieved, the technical problem that a structure which can penetrate through a core tire and is directly effective in effect is selected and used when a hollow concrete structure is prefabricated in the industry is solved, and the integrity, the strength and the anti-seismic performance of the hollow concrete structure are improved.