The invention relates to a centrifugal disc, and especially relates to a centrifugal disc with a thermal insulation bottom. The provided centrifugal disc is in a round plate shape and comprises a bottom plate, a side wall, a flange connection part, a thermal insulation layer, and a protective layer. The protective layer, the thermal insulation layer, the bottom plate, and the side wall are arranged from bottom to top. The centrifugal disc bottom is provided with a thermal insulation layer to reduce the heat loss in the centrifugal disc. Thus the temperature reducing speed of the high temperature molten glass that flows into the bottom of the centrifugal disc is reduced, the viscosity change range is narrowed down, the quality of glass fiber product is improved, and the performance stability among different batches is also improved. Moreover, through the cooperation between the thermal insulation layer in the centrifugal disc bottom and the protective layer, the service life of the centrifugal disc is prolonged, and thus the production cost is reduced.