Firm type high-heat-resistance extruded insulation board

The utility model discloses a firm type high-heat-resistance plastic extrusion insulation board, relates to the technical field of plastic extrusion insulation boards, and discloses a heat insulation inner cushion block which is arranged inside a plastic extrusion insulation board body and fixedly connected with the plastic extrusion insulation board body through a clamping groove, and two sides inside the heat insulation inner cushion block are respectively provided with an anti-permeation inner block which is fixedly connected with the plastic extrusion insulation board body through a clamping groove. The anti-permeation inner block is fixedly connected with the extruded insulation board body through a clamping groove; the isolation soft cushion block is arranged on one side of the anti-permeation inner block, the isolation soft cushion block is fixedly connected with the anti-permeation inner block, the isolation soft cushion block is fixedly connected with the extruded heat preservation plate body through