This paper analyzes the characteristics of the automobile trade market and proposes the functions and system architecture of the automobile trade information search engine. Based on the research of Lucene’s functions and structure, it presents the strategy to implement the information gathering modle, index creation module and information query module in detail. It improves the Vector Space Model (VSM) by using the weighted values of automobile information, realizes the similar automobile information recommendation function, and completes the design of the automobile trade information search engine.