Abstract Research purposes: The design of the comprehensive pipelines is a major difficult work for construction of the metro car depot，and is crucial to the design of the metro car depot． Generally the design of the comprehensive pipelines begins after all construction drawing of the other specialities have been finished． Thus，the design time of the pipelines is very short． At present，the traditional design thought and methods for the comprehensive pipelines already can＇t meet the design needs． In order to better solve the problem that the design time of the comprehensive pipelines is short，requiring high quality，it is very urgent to offer the new design method for the comprehensive pipelines．
Research conclusions: Based on the summary of the design of the comprehensive pipelines of the ground metro car depot and double － layer metro car depot，the idea on using backstepping method to design the comprehensive pipelines is offered． In this way，the design time of the comprehensive pipelines can be reduced by 50% and the design quality and the comprehensive quality of the designer can also be improved．
2011, Vol. 28 
