Dual-density mixed in-mold foaming inner tire and production process thereof

The invention relates to a double-density mixed in-mold foaming inner tire. The double-density mixed in-mold foaming inner tire comprises a low-density outer layer and a honeycomb inner layer; the honeycomb inner layer is formed by connecting a plurality of honeycomb unit groups distributed in an equal circumference end to end, and each honeycomb unit group is composed of two first honeycomb unitsdistributed in parallel and second honeycomb units arranged on the two sides of the two first honeycomb units respectively. Each of the first honeycomb unit and the second honeycomb unit consists ofa honeycomb high-density outer layer and a honeycomb low-density inner layer; the density of the honeycomb low-density inner layer is 800-900kg / m<3>, the density of the honeycomb high-density outer layer is 1200-1300kg / m<3>, and the density of the honeycomb low-density outer layer is 900-950kg / m<3>. The double-density mixed in-mold foaming inner tire has the advantages that the inner tire is combined with an outer tire for use, and the outer tire obtains relatively high supporting performance while good buffering and shock absorption are guaranteed.