Abstract：It is assumed that all the influence factors surrounding deep-buried circle tunnel are axially symmetrical. Firstly，the solution of fluid flow field is resolved. Secondly，analytical formulae of elastic stress and displacement are obtained considering the body force of seepage. Thirdly，applying Mohr-Coulomb yield criterion，analytical formulae of plastic stress and plastic radius are obtained. An example is analyzed and contrasted with and without considering fluid flow field. The research shows that the influence of seepage field on stress field is intensive along with the gradient increment of inner and outer water head of tunnel，and the influence degree on tangent stress is more than that on radial stress. The distribution law of stress is not coincide with and without considering fluid flow. The compressive stresses and plastic radius are gradually decreased along with the increasing inner head，and the plastic radius may be zero if the inner head increases continually to some extent. The influence with considering influence of fluid flow is larger than that without considering the influence.
