Abstract: In order to provide theoretical basis for the design and construction of large excavation parallel zoned in soft clay, numerical models were established based on the typical parameters of parallel zoned. The horizontal displacement of retaining wall, the surface settlement, the internal settlement and horizontal displacement of the soil outside the excavation are analyzed. Moreover, the mechanism of deformation controlling during parallel zoned of large-scale excavation was studied. After zoned, the horizontal displacement of the top of retaining wall is slightly larger than that of the non-zoned excavation. The depth of the maximum horizontal displacement is similar to that of non-zoned excavation, but the maximum horizontal displacement of retaining wall is 31.1% less than that of the non-zoned excavation. The position of the maximum surface settlement is closer to excavation than non-zoned excavation, and the maximum surface settlement is reduced by 35.1% than that of non-zoned excavation. The horizontal displacement, surface settlement and soil deformation outside the excavation are mainly caused by the excavation of the adjacent narrow foundation pit. The internal settlement, the horizontal displacement of the soil and unloading impact depth are smaller than those of without zoned. During excavation of the distant large-area excavation, the outer retaining wall has a strong shielding effect on soil deformation by its greater rigidity. When excavating the narrow excavation, the rule that the smaller the excavation width, the smaller the deformations caused by the excavation can be fully utilized. Zoned excavation is consistent with the time-space theory. The parallel zoned can take full advantage of the shielding effect of the outer retaining wall, the excavation width effect on deformations, and the time-space effect.