For the purpose of improving the level of green construction and solving the prob-lem threating resource and environment， select green construction， environment protect and resources saving to establish comprehensive evaluation index system and establish a multi-level grey evaluation model of urban deep foundation pit supporting project， the evaluation of alternative four supporting scheme of green construction level.On this basis， the model to the optimal selecting of schemes of Xiang He Homes in Hunan is used.The results show that the comprehensive evaluation value of soil nailing support is the highest， the most suit-able for green construction requirements.