Compared with the common deep foundation pit engineering, the asymmetric construction of subway deep foundation pit is more difficult and risky. To conduct risk evaluation of the asymmetric construction reasonably and effectively, a risk evaluation index system was established based on enclosure structure, asymmetric soil pressure of existing stations, foundation pit environment, surrounding environment and site safety management, which rely on a subway deep foundation pit project in Guangzhou. Fuzzy analytic hierarchy process and multi-level fuzzy comprehensive evaluation method were used to set up an evaluation model for asymmetric construction of subway deep foundation pit. According to the quantitative calculation results, the risk ranking of asymmetric construction risk of deep foundation pit could be obtained, which match well with the evaluation set and the practical engineering.According to the weight of each index obtained from the evaluation results, relevant measures can be taken to reduce the risk.