Sintering furnace heat preservation barrel with high heat preservation performance

The utility model relates to the technical field of sintering furnace heat preservation, in particular to a sintering furnace heat preservation barrel with high heat preservation performance, which comprises a base, an inner barrel, a heat preservation layer and an outer barrel, the heat preservation layer comprises side carbon paper carbon felt layers wrapping the outer wall of the barrel body layer by layer and top carbon paper carbon felt layers wrapping the outer end face of the barrel bottom, the top carbon paper carbon felt layers are partially formed by folding turnover layers in the side carbon paper carbon felt layers upwards, and a cylindrical thickened heat preservation body is laid between every two adjacent top carbon paper carbon felt layers; an upper cover plate is arranged at the upper end of the heat preservation layer, a top cover plate is arranged at the upper end of the outer cylinder, and a plurality of fastening strips connected to the outer end face of the upper cover plate are arranged