为了研究中日间钢铁产业内贸易及其主要影响因素,首先,选用相关指数和方法对1990～2009年两国钢铁产业内贸易水平进行分类测量发现,中日钢铁总体产业内贸易水平呈波浪形增长,产业内贸易模式以垂直型产业内贸易为主;其次,运用时间序列分析对总体产业内贸易、水平型和垂直型产业内贸易与各影响因素分别进行了协整检验和Granger因果检验,在实证结论基础上文章提出重点应在优化出口产品结构、提高市场集中度、提高自主创新能力等方面努力。 In order to study the intra-industry trade between China and Japan during the daytime and its main influential factors, firstly, using the relevant indices and methods to classify the intra-steel trade between 1990 and 2009, we find that the intra-industry trade between China and Japan is wavy Growth and intra-industry trade patterns are dominated by vertical intra-industry trade. Secondly, using time series analysis, we conduct a cointegration test and Granger causality test on intra-industry trade, horizontal and vertical industry intra-industry trade and various influencing factors, Based on the empirical conclusions, the article puts forward that the key points should be efforts to optimize the structure of export products, increase market concentration and improve the capability of independent innovation.