With more mines into deep mining，hard rock in high geo-stress shows high energy storage and generates fractures easily by disturbances， and also roadway excavation accelerate surrounding rock cracking or even broken,so the fracturing rock can be cutting by mechanical tools.Those characters make it possible to operate continuous mechanized mining in the hard-rock ore-body.In this paper，Guizhou Kaiyang phosphate mine is chosen as an engineering background，the simulations of the roadway excavation damaging process were conducted by FLAC^3D，and the displacement and plastic damage zone of surrounding rock of three shape roadway section were studied.The results show that the damage scale of the rectangular section is maximum，as well as the displacement，and that the displacement damage zone scale of surrounding rock increase apparently with the geo-stress levels increasing.The failure and displacement of surrounding rock decrease first and then increase with the increasing of lateral pressure coefficient.In the high stress level and high lateral pressure coefficient conditions，the surrounding rock of rectangular section tunnel excavation has a greater displacement and larger plastic failure zone,and the fracturing effect are optimum.These results present a theoretical basis for the layout and the design of induced roadway and illustrate subsequent fracturing rock can be cut by mechanical tools.