finite element method and finite difference method regarding the soil nail as a one dimensional structural element with the capacity to sustain uniaxial tension and compression. In fact
the shear force of the soil nails take very important role in control the displacement and maintain the stability of the slope. The authors proposed a new method to calculate the shear force of the soil nail. An example of foundation pit is illustrated; the results of the soil nail take the shear force into account consistent with the measured in-situ very well. Conclusions may be of very practical value in design and construction of soil nailing.