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The length of pipeline has nearly 11 104 km in china, and has basically formed the backbone network.However, with economic development, economic development zone area is densely populated,the original pipeline by class Ⅰ or Ⅱ location changed into class Ⅲ or Ⅳ location, and it is universal problem that design early does not accord with the current situation.It is costly, bring new risks at the same time, and difficult to solve problem, if all situation take measures of depressurization and replacement pipeline and rerouting.This paper proceed from the pipeline risk, carry out system studies to the problem of the pipeline class location update, draw lessons from foreign pipeline companies laws and regulations of class location upgrade management, obtain the necessary condition of pipeline update in china, put forward need to take measures of the allows updated in range of pipeline class location update,and further carry out description to updated location by the case analysis.The study shows, solved the problem of the pipeline class location update, that it is great significance to public security management and the remarkable economic benefit.