Abstract: Location survey is an important part of equipment before installation, the accuracy of the data relates to the late stage of train operation control accuracy. This article taken the location survey of wayside equipment of practical engineering as the background, discussed the types and methods, the key points of location survey in Urban Transit, analyzed the causes of error. The location survey method is the summarize experience of SelTrac System in the actual project, can provide a reference for the equipment installation and measurement of Urban Transit.