Induction synchrotron has been a focus of improving the intensity of high energy ion beams.The principle experiments of this new acceleration concept have been done by the Japan's High Energy Accelerator Research Organization(KEK).In this paper,a Matlab program has been build to simulate the longitude dynamics of the induction synchrotron,based on the parameters and results of the principle experiments.The simulation results are in accordance with the theoretical analysis and experiment results.The causes o...