A super metro station pit is analyzed using Modified Mohr-Coulomb and Hard Soil in Tianjin soft soils. First, the top-down construction method and normal construction method are compared using Modified Mohr-Coulomb model, and the result showed the top-down method has less impact on surrounding environment, but it causes larger horizontal displacement of Dwall. The top-down method is a better construction scheme. Second, the top-down construction method and normal construction method are also respectively studied using Hard Soil model, and gained same result as using Modified Mohr-Coulomb model. Third, the results gained by two models are compared to the practical monitored values, then found the Hard Soil model matches better with monitored values, and it is more suitable to analyze the foundation pit excavation in Tianjin soft soils. In one crossing section, the grounding surface settling area linearly increases with horizontal displacement of Dwall.