This paper devised a new method of close-loop rectification for integrated navigation system

which has been the important developing direction of the navigation technique at present.This method realizes close-loop rectification by using the accumulated error to compensate the output of the subsystems.Taking the INS/GPS integrated system as example

the paper illustrates the practicable algorithm

and provides the result of computer simulation.The method has the advantages of the open-loop and close-loop rectifications

and can be used in various navigation systems which use indirect-filter-positioning method by the measurement of pseudo-range.As a result

the method has extraordinary practical value in the technique developed for the integrated navigation systems.