The surrounding rock deformation laws and grouting control effect of largespan XinxiuLiantang Port Tunnel on Shenzhen Rail Transit Line No. 2 are analyzed by FLAC3D numerical simulation method when adopting different combinations of doubleside drift method and CD method crossing fault. The analytical results show that: (1) The maximum displacement occurs at two key deformation control areas, i.e. the intersection of crown top between grade Ⅳ/Ⅴ surrounding rock boundary and the fault zone and the intersection of waist between grade Ⅴ surrounding rock and the fault zone, when tunnel crosses fault and fracture zone. (2) The deformation of surrounding rock is under effective control by adopting doubleside drift method when largespan metro tunnel crosses fault zone; and the maximum influencing scope of surrounding rock under actual construction method combination is 12.4 m. (3) The grouting around the fault and fracture zone has a good effect on surrounding rock deformation mode and control; and the shape of surrounding rock deformation area turned from a date pit to an uniform oval. (4) A quantitative description of the grouting control effect is proposed in surrounding rock displacement. The vertical displacement control rate of surrounding rock with 3 m grouting thickness reaches 51%, which shows a good surrounding rock deformation control effect.