DNS(Direct Numerical Simulation) using pseudo-spectral method achieves great accuracy and high efficiency. Parallel computing algorithm is needed because of much calculation work in condition of high Reynolds number. However,it is difficult for parallel computing algorithm with FFT(Fast Fourier Transform) to be used in practical application. A new parallel computing algorithm based on MPI is put forward. According to the test this method is accurate,easy and stable,with higher computing speed and less compu...