Abstract:In the developing process of automobile industry , the reasonable matching of automobile powertrain has been a research point on the automobile area. To a great extent ,the automobile power and the efficient quality are decided by degree of the automobile powertrain reasonable match.The reasonable matching of the engine and the power transmission will reduce obviously automobile's fuel oil consumption, obtain the good power and reduce the emissions. This article will summarize the common used methods for the reasonable matching of automobile powertrain and establish a fundamental mode on the research of the kind of matching.