© 2022 IEEE.The increasing computational cost in complex optimization problems that have a large size resulted in the development of optimization algorithms in parallelization. PSO's basic architecture inherits parallelism of natural and the acceptance of quick handling machine has made this mission pretty convenient. The emergence of parallel PSO (PPSO) as an algorithm has been well accepted by the researchers. Parallelizing algorithm PSO has been used in a number studies so far. This proposed work provides an overview of the parallelism of the PPSO.