It is well known that Welch algorithm is one of classical power spectrum estimation which is used widely. But facing a rapidly growing massive data, it will spend a plenty of time to operate Welch algorithm in the serial Matlab circumstances. Though a parallel computing toolbox is involved in Matlab in 2004, it is too expensive to be used widely. A parallel Welch algorithm, which is implemented using the Master-Slave parallel programming model with the support of Linux clusters and MPI, is proposed here dep...