为了解决计算精度与计算时间之间的矛盾，针对三场耦合问题，根据区域分解策略，采用预处理共轭梯度法进行方程组的并行求解，利用mpi+f77编制主从式并行有限元计算程序，并在河海大学高性能计算机群上进行调试及计算，通过算例计算，显示并行计算可大幅节省计算时间，未来必会得到更广泛的应用。

In order to solve the contradiction between the computing precision and computing time, according to the THM(themo-hydro-mechanical) coupling mechanism and the domain decomposed method, the paper selects preconditioning conjugate gradient to solve paralleled solution of system equation, in which using mpi+177 establishes a master Islave model and the calculation of the governing equations is performed on the Hobai University high function computer, and this question is verified by one example .The conclusion showed that this method can obviously save the computing time and will be applied extensively in the future .