Abstract: Building rubbish can be used in highway subgrades in order to solve the contradiction of the sustainable development and the shortage of sandstone aggregate． The paper introduced construction technology of building rubbish filling subgraded by combining with the test section of the Xuyu Highway． The research was done from the main building rubbish processing and staking，base treatment，transportation，burden distribution，leveling and rolling． The compacted settlement difference and porosity were used as the evaluation index of compaction quality． The result shows that the approach in this paper is feasible，which not only can reduce the negative impact on the ecological environment caused by the mining of the stone，but also remarkable social and economic benefits be got． All these can supply references for the use of future building wastes in subgrade constructions．