From the point of intra-industry specialization, this paper portrays the spatial distribution pattern of automobile manufacturing in beijing-tianjin-hebei region. On the basis of measurements of the degree of Intra-industry specialization by the method of niche width and niche overlap, it analyses the spatial distribution of Intra-industry specialization of auto manufacturing industry in Beijing-Tianjin-Hebei Region from the aspect of efficiency and policy respectively, which finds that current situation is not very reasonable. As a result, concrete suggestions about the optimization of spatial distribution pattern of intra-industry specialization of auto manufacturing industry in beijing-tianjin-hebei regional are put forward.