Since the self-insulation wall has the same service life as the building, the resources are saved, and the environmental pollution is reduced, so it has been widely used. In order to obtain the optimal filling position and filling rate of the composite self-insulation hollow block, the thermal insulation performance of the composite self-insulation hollow block was optimized. In this experiment, 6 groups of self-insulating block models with different filling positions and filling rates were

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... tructed. A cold and hot test box was used to simulate the working state of 6 groups of composite self-insulation blocks in the continuous operation of air conditioning in cold areas of China in winter. Through comparative analysis: Filling the hollow block with EPS insulation material is conducive to improving the insulation performance of hollow brick, and the higher the EPS filling rate is, the better the insulation performance of the block is. At the same EPS filling rate, the closer EPS is to the inside of the heat box, the better the insulation effect of the wall will be. At the same EPS filling rate, the method of filling EPS on both sides of the cavity has the best insulation effect, which is conducive to saving insulation materials.