Abstract: For this paper，in the light of research practices of authors in the recent years，after reviewing the study object and the study methods of traffic flow theory in brief，we dissertate the developmental states and subsistent problems of some kinds of theoretical models of traffic flow． Aiming at these problems and following the idea of combining macroscopic methods with microscopic methods. we investigated the differences and relations of these two kinds of research methods，and developed a number of new theoretical models of traffic flow which are more suitable to the practical traffic． By using these new models，we can describe the practical traffic problems more accurately and more effectively． The research results indicate that combining macroscopic method with microscopic method will promote the new development of traffic flow theory．

Key words: traffic flow, continuum model, car-following model, cellular automata model, combining macroscopic method with croscopic method

摘要： 结合作者近年来的研究实际，在简要评述了交通流理论研究的目标和方法基础上，论述了几类典型的交通流理论模型的发展简况和存在问题．针对这些问题，作者按照微观、宏观方法相结合的思路，探讨了两种描述方法间的区别和联系，从而，发展了一些新的更切实际的交通流理论模型，并灵活应用不同理论模型，更精确、更有效地描述了实际交通流问题． 研究表明，微观宏观方法相结合，可以推进交通流理论的新发展．

关键词: 交通流, 连续模型, 跟驰模型, 元胞机模型, 微观宏观方法结合