Parallel computing is becoming the strong trend of solving large scale geotechnical problems。Taking the scheme optimization of the soft-rock replacement in Shuibuya large cavern group for example

parallel computing for the scheme of optimization is discussed。 The following problems such as the parallel programming modes

programming method， tasks dividing data communication and load equilibrium are analyzed。The parallel computing for the scheme optimization of soft-rock replacement is successfully accomplished in the personal computers which run in the windows operating system。The final results indicate that the linear speedup ratio is almost achieved

accordingly the computing speed and efficiency of the scheme optimization is promoted greatly。This paper provides an important reference for the application of parallel computing in the geotechnical engineering.