Abstract: This paper studies the parallel numerical simulation of interaction between intense laser and hydrogen clusters. Based on 1D hydrogen atom cluster model and particle-particle algorithm and PIC method, a parallel system and strategy was designed with hybrid MPI and OpenMP programming and the speedup was ideal. The relaxation time constant was also introduced to effectively handle the process of particle collision. The results of the simulation were in fairly good agreement with experimental results, which shows that this parallel computing system and model is stable and feasible.