The space-charge effects can impose significant influence on the high intensity beam transport process. Along with the development of computing physics and computer science, PIC (Particle-In-Cell) methods are playing an important role in the accurately numerical simulation of charged particle beam’s behavior in accelerator and beam transport line. Along with the development of computing physics and computer science, PIC (Particle-In-Cell) methods are playing an important role in the exact numerical simulation of charged particle beam’s behavior in accelerator and beam transport line.