Abstract: Along with the fast development of NDT,X-ray Real-time radiographic method obtains great application.This paper discussed X-ray Real-time Radiographs detecting method research on insulated pipes,and this text emphasizes the experimental method of determining corrupt thickness of pipes and establishes the thickness mathematic model of the pipes.Consequently,we can make sure the corrupt thickness of pipes.The measurable research about pipe corrupt thickness helps to evaluate the safety of pipes and discover the hidden trouble in time.