Abstract: Ground fissure is one of the most typical urban geo-hazards in Xi'an, and the stratum deformation and ground settlement caused by metro tunnel construction in the ground fissure section is a prominent engineering geological and geotechnical engineering problem. In this paper, the Xi 'an metro line 6 is taken as the engineering background, and the ground settlement and tunnel deformation induced by the excavation of CRD method in the ground fissure section is simulated with the finite element method. The results show that the ground surface settlement caused by excavation is characterized by an inverse s-shaped change and the excavation footage of the hanging wall have a greater influence range than that of the footwall in the ground fissure section. The ground surface settlement in the center line of the tunnel is staggered in the ground fracture zone and a concentrated settlement area appears at 5 m near the hanging wall of the ground fissure. The influence area of the shallow-buried excavation on the surface is about 80 m in ground fissure zone, whicht is about 45 m in the hanging wall and about 35 m in the footwall. In this range, the impact of the underground excavation on the nearby surface structures should be considered. In the process of excavation, the ground settlement process of the hanging wall is longer and larger than that of the footwall and the lateral deformation laws of the ground surface conforms to the Gaussian curve distribution. The settlement values of the hanging wall are larger than that of the footwall, and the width and settlement value of the tunnel groove increase at the position of the hanging wall near the ground fissure. The maximum settlement of the arch roof occurs at 5 m away from ground fissure, with a value of 25 mm, while the uplift deformation of 27 mm occurs on the arch bottom at the ground fissure zone. The deformation of the arch top and arch bottom is staggered near the ground fissure zone. The influence areas of the shallow-buried excavation of tunnel on the arch roof and bottom are 50 m and 55 m, respectively. The tunnel lining near the hanging wall of the ground fissure zone during excavation construction should be supported in time to prevent soil collapse and lining deformation. The research results can provide a scientific basis and technical guidance for the underground excavation construction of the metro tunnel crossing ground fissure zone in Xi'an.