随着经济的发展，我国的三大产业也在随其变化。三大产业是体现国家的产业结构层次的关键，研究三大产业之间的关联度也是研究三个产业之间也存在着怎样相互依赖且相互制约的紧密关系。由于发达国家同发展中国家在产业结构层次上有相同变化趋势，因此本文通过2002年、2005年的投入产出表，对相关指标进行计算分析，研究三大产业之间的关联程度，用RAS法对2002年三产业直接消耗系数进行调整，提出相关的建议来实现对产业结构的优化调整。
With the development of economy,
China’s three major industries are also changing. The three major industries
are the key to reflect the industrial structure of a country. The study of the
correlation degree among the three industries is also the study of how the
three industries also have a close relationship of mutual dependence and mutual
restriction. Developed countries and developing countries have the same trend
of change in industrial structure. Therefore, this paper calculates and
analyzes relevant indicators through the input and output tables of 2002 and
2005 to study the degree of correlation among the three major industries. RAS
method is used to adjust the direct consumption coefficient of the tertiary
industry in 2002.
