The invention discloses a thermal load tester for epoxy resin waterproof layers for gussasphalt pavement and a thermal load test method for the epoxy resin waterproof layers for the gussasphalt pavement. The thermal load tester comprises a test platform, a screed located on the test platform, a horizontal moving unit for driving the screed to move, and a lifting unit for driving the horizontal moving unit to move. Gussasphalt concrete is poured onto the test platform coated with an epoxy resin mixture, torches are mounted on the screed, flames are spit from the torches to preheat the screed, the screed is connected with the horizontal moving unit, the horizontal moving unit drives the screed to horizontally move, so that the gussasphalt concrete is flattened, the lifting unit is located under the horizontal moving unit, and the screed moves up and down along with the horizontal moving unit under the action of the lifting unit. The invention solves the problem of high temperature resistance of epoxy resin under the high temperature effect of gussasphalt concrete and the problem of mechanical properties of epoxy resin after the high temperature effect of gussasphalt concrete. The method is easy to operate, reduces cost, and brings convenience to the implementation of material property comparison and practical application in construction.