The problems with underground service pipes are the regular session of accidents in city gas line network which is directly related to people's lives. However, there are potential risks with underground service pipe. The scientific and reasonable gas service pipe should be to minimize the accidents and easy to installed and guarantee the economical in the case of ensuring gas use. Comparing and analyzing the two ways frequently used in daily life from the aspect of pipe materiel and pipe laying methods, drawbacks of them are identified. Finally, the main use of PE pipe is recommended and measures to transform are proposed, which eliminate the security risk after improvement, and obtain the economic benefit in the long term.