Abstract: This paper applies the combination of the finite element with an optimal method, and a new easy calculation of the pressure of rock in the underground engineering is pressented. It is based on the translation actually measured uses the optimal method for calculating stresses to approach the stress actually method so that the law can be counter-calculated of the pressure distribution of around rock on the tunnel. It also applies both the advanced finite element analysis program-SAP5 Hooke-Jeeve's optimal method, presenting a new way for the calculation of the pressure distribution of the around rock in the underground engineeering. It will play a great part in the design of the underground engineering and the research of the underground pressure.