Along with the development of science and technology, the time comparison system with multiple cascading node network and high accuracy is necessary in more and more application field, such as modern shooting range, war field and radar observation bases. At present, navigation satellite common-view technology is widely applied in the time comparison field of multiple nodes, where the accuracy of nanosecond magnitude is necessary. But the data exchange link must be built before this common-view method is used. Thus, its application is limited when there isn’t enough resource to build the data exchange link. The time comparison system with multiple node network is designed based on the pseudo-code ranging theory, two way time comparison method and the technique of CDMA(Code Division of Multiple Access). In this system, additional data exchange link is needless. Otherwise, the important technical problems are analyzed and solved. Finally, validation experiments are done based on the designed time comparison system. The experiment results show that the time comparison uncertainty better than 0.5 ns is reached when the baseline is less than 500 meters and the change of node number doesn’t worsen the time comparison performance.