Statistical analysis is firstly carried out for the ground conditions and retaining structures for deep excavations of the metro stations of Nanchang Metro Lines 1~4, which splits the River Terraces into two typicalcategories of ground conditions (type Ⅰ and type Ⅱ) with corresponding retaining structures for deep excavations for metro stations. Then taking Nanchang Metro Line 2 Dinggong Road South Station, Line 1 Zhujiang RoadStation and Line 3 Zhenxing Avenue Station as examples, numerical analyses with the small strain stiffnesshardening(HSS) soil model are conducted and the predicted deflection of retaining walls and ground settlementare in agreement with field data. This shows that using HSS soil model and E₅₀^ref=1.5N for sand deformation modulus(N is the corrected count of blow) can well predict the deflection of retaining walls and ground settlement.On this basis, this paper numerically and statistically analyzes the deflection of retaining walls and ground settlement in Nanchang area, and draws conclusions that for the deep excavations of the subway stations in Nan chang typical river terraces, the ratios of the maximum lateral deflection of retaining wall structures and themaximum ground settlement to the excavation depth are δ_h,max/H=0.05%~0.12% and δ_v,max/H=0.03%~0.10%,respectively, and the ratio between the maximum ground settlement and maximum lateral deflection is about δ_v,max/δ_h,max=0.45~1.4.