Abstract: In order to reduce the re-radiation of the solar volumetric absorbers,a double layer absorbers that was made up of multiple tubes and the porous was proposed. The thermal radiation performances of the double layer receiver were carried out by experiment test and the Monte Carlo method（MCM）. Results show that the most of the solar thermal resource is absorbed by the inlet section of the porous. When the working temperature is equal to 1000 K,the ration of the solar absorption and the emission of the double layer is up to2.0. Moreover,the radiation thermal efficiency of the double layer receiver is about 30% higher than that of the monolayer porous receiver.