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For improving the accuracy of clock synchronization and reducing the offset brought about by the disunion of measure benchmark of the ship integrated power system,a method to improve the accuracy of clock synchronization is proposed. By taking advantage of the time stamp included in the packet network,offset can be used to modify the slave clock,and the accuracy of the synchronization between master and slave clock can be compensated.Modeling with Matlab,afterwards the slave clock can be modified both in algorithm and in hardware.Simulation and test results shows that this method can provide signal with the offset less than 60ns,not only the problem of measurement accuracy is resolved, and more improvement could be achieved via the ethernet,meaning more in research and projiet.