Aiming at the problem of improving the executive efficiency of μC/OS-II based on EP9315, and combining the μC/OS-II with the structure of EP9315,the primary factor to influence system this performance is analysed,and the resolution is given.The executable image locates again in the memory by Scatter-loading mechanism,calculating appropriate clock interrupt in accordance with implementation of the task,and the clock interruption cycle is dynamic modification,so that the running task is not interrupted meaninglessly too much,So improving the system executive efficiency consequently.