中文摘要：

长三角地区作为我国经济发展的重要增长极，其现代服务业的发展在全国遥遥领先。运用里昂惕夫的投入产出模型，就上海、浙江和江苏现代服务业的总体水平和产业关联效应进行了实证分析。发现上海市的现代服务业属于最终需求型产业，与国民经济各部门的前向联系超过了部门平均水平，后向联系则低于部门平均水平；而浙江和江苏省现代服务业的产业关联效应相对比较弱，对国民经济的拉动作用不强。最后就各省市现代服务业发展的现状，本文提出了因地制宜发展各地区现代服务业的相应对策，强化现代服务业在国民经济发展中的拉动作用，并应加强长三角的联动发展。

英文摘要：

Yangtze River Delta region is an important growth pole in China＇ s economic development. The development of modem service industry is far ahead in the country. This article uses the Leontief input-output model, makes an empirical analysis of the overall level and correlation effect on the Shanghai, Zhejiang and Jiangsu modem service industry. The results show that：Shanghai modem service industry belongs to the final demand-based indus- tries, forward linkage with other sectors is over the sector average level, backward linkages is lower than the sector average level. However, the industry correlation effect of Zhejiang and Jiangsu is relatively weak, can not drive the national economy strongly. In the end, this article puts forward countermeasures according to local conditions of modem service industry in various areas. We should strengthen the pulling effect of the modem service industry in national economic development, and should strengthen the joint development of the Yangtze River Delta.