The invention discloses a damp heat aging test device, which belongs to test equipment of building materials in the building field and comprises a box body with an embedded type box cover, wherein the box body is internally provided with a heater, a water pump, a fan, a bracket, a core barrel and a transition box; the box body consists of an inner container and a shell, and an insulating materialis filled between the inner container and the shell; the upper end of the box body is provided with a water sealing groove, and the embedded type box cover is arranged at the water sealing groove; the core barrel and the transition box are arranged on the bracket; the fan is arranged above the bracket; and the lower part of the core barrel is provided with a test sample frame, and the upper part of the core barrel is provided with operating holes. The damp heat aging test device has the advantages of simple structure, reliable performance, low cost, low operating cost, easiness in maintenanceand simplicity in operation, and can meet the test requirement of national standard.