The knowledge that hydrostatic pressure is equal to the gravity value of the overlying rocks in studying a dynamic state of certain underground site is argued. It is suggested that the stress field T in the crust is a combination or superposition of total hydrostatic pressure P with differential stress σ,and the total hydrostatic pressure P at any point in the crust comprises two parts: one is spherical stress tensor P_G caused by the gravity, and the other is spherical stress tensor P_s caused by tectonic stress; therefore P could not be attributed to the gravity of overlying rocks only. The results obtained by a finite-element simulation indicate that the tectono-original additional hydrostatic pressures P_s decrease gradually from the compressive zone (p_c~S) to the shear zone (P_(SH)~s)and to the tensile zone (P_T~s), i.e.P_c~s>P_(sH)~s>P_T~s in the same depth. On the basis of the above-mentioned research, the method of measurement and calculation of metallogenetic depth corrected by P_s is establi The knowledge that hydrostatic pressure is equal to the gravity value of the overlying rocks in studying a dynamic state of certain underground site is argued. It is suggested that the stress field T in the crust is a combination or superposition of total hydrostatic pressure P with differential stress σ, and the total hydrostatic pressure P at any point in the crust comprises two parts: one is spherical stress tensor P_G caused by gravity, and the other is spherical stress tensor P_s caused by tectonic stress; therefore P could not be attributed to the gravity of overlying rocks only. The results obtained by a finite-element simulation indicate that the tectono-original additional hydrostatic pressures P_s decrease gradually from the compressive zone (p_c ~ S) to the shear zone (P_ (SH) ~ s) and to the tensile zone (P_T ~ s), ieP_c ~ s> P_ (sH) ~ s> P_T ~ s in the same depth. On the basis of the above-mentioned research, the method of measurement and calculation of metallogenetic displacement by P_s is establi