Abstract: Layered rock mass and the interlayer shearing fracture zone have complex influences on the magnitude and direction of local stress field in underground engineering areas. In order to explore the in-situ stress field state of underground caverns in layered rock mass, layered rock mass widely distributed in engineering area is taken as the research object. The transverse isotropic model in FLAC^3D is used to simulate layered rock mass, and the lateral pressure coefficient method is used to study the in-situ stress field characteristics of layered rock mass. Through the numerical analysis of layered rock mass plane block, the influence of layered rock mass on the magnitude, direction, and disturbance range of the surrounding geostress field varies regularly with: ① the angle α between the strike of the rock layer and the regional principal stress; ② the modulus ratio K_a; ③ Poisson’s ratio ν₂ of mudstone layer; ④ Elastic modulus of parallel and perpendicular to bedding plane of mudstone; ⑤ the boundary principal stress ratio K_b; ⑥ the scale of layered rock mass. The results show that the maximum principal stress value increases outside the weak rock layer of layered rock mass, and the direction is deflected parallel to layer. The value of the maximum principal stress in the inner side of the soft rock layer is reduced, and the direction is perpendicular to the plane. The factors ①, ② and ⑤ have a significant influence on the magnitude, direction change amplitude and disturbance range of the in-situ stress field near layered rock mass. The factor ④ mainly affects the magnitude of the change, and has little effect on the range. The factor ⑥ mainly has a great influence on the disturbance range, and has little influence on the amplitude. Poisson’s ratio is not a sensitive factor affecting the local stress field. The variation of this effect is mainly limited to a certain range near layered rock mass, and the far away from layered rock mass tends to be consistent with the regional stress field. In addition, the in-situ stress field near soft and hard interbedded rock mass shows obvious distribution of stress concentration zone and stress release zone, forming a unique stress influence zone of layered rock mass.