Abstract: This paper designs a multi-core system simulator MPSimu(MPSoC Simulator) with configurable system structure parameters, which realizes the balance of speed and precision of the simulator by using the hybrid precision modeling technology, and integrates the debugger and the layout optimizer for work data collection, debugging and layout optimization. The experimental results show MPSimu simulates the behavior of the target system more accurately. The test program running on MPSimu has a period error of less than 10% with the measured period of the system, providing an efficient solution for MPSoC performance evaluation and architecture analysis.