Abstract:Underground pipeline is the basis for national economic development. It is the artery for maintaining normal operation in urban and rural areas. In order to meet the daily management of pipeline, avoid the loss of human living and property of the State, the achievements of pipeline detection must be provided timely and accurately. In this paper, combining with actual detection work of Weifang underground pipeline, some problems which will be met in real work frequently, such as near parallel and cross pipeline, pipeline anticorrosion layer damage, non metal pipeline and high interference area have been discussed and summarized.