Previous researches on skarn tungsten deposits have mainly focused on causative rocks and skarn minerals. The effect of the physical and mechanical properties and geochemical characteristics of the country rock on the mineralization of skarn tungsten deposits urgently needs to be further studied. Previous studies have shown that the mechanical properties of country rock at different depths which determine the deformation mode and scale of country rock under the action of external forces. But the qualitative research is limited to the quantitative mechanical properties of country rock and its constraints on mineralization have not been carried out. Longjiaoshan, was newly discovered in the Edong orefield of the Middle- Lower Yangtze River metallogenic belt, which is an ideal research object for the influence of mechanical behavior of country rock on skarn mineralization. The mechanical properties of country rock strata and ore- forming rock masses at different ore- hosting depths were measured by triaxial compression test system, and the mechanical behavior of country rock at different depths and its influence on mineralization were discussed. The elastic modulus (E) of limestone decreases first and then increases and then decreases with the increase of depth, while the triaxial relative strength (S) of limestone increases first and then decreases with the increase of depth. The hardening modulus (H) and falling modulus (M) of limestone show a nonlinear trend with depth, while the elastic modulus (E), triaxial relative strength (S), hardening modulus (H) and falling modulus (M) of granite all show an increasing trend with depth. The two kinds of pre- peak plastic indexes of limestone decrease firstly, then increase and then decrease with the change of depth. It can be seen that there is a mutual influence between ground stress and mineral composition on the plastic characteristics of limestone. The post peak plasticity index of limestone at different depths varies greatly with depth, among which B resStress and B resStrain have reverse coordination, indicating that limestone has brittleness characteristics as a whole. The strength of magmatic hydrothermal action on country rock is much greater than the strength range of country rock, that is, the change of mechanical properties of limestone must be considered in the process of mineralization. The further study of the influence of country rock on the mineralization of skarn deposits should not been ignored.