Abstract: Chinese economy has entered into adjustment phase of undulation since international finance crisis in 2008. With the weakening external demand, reduction of internal investment space and weakening demographic dividend ,adjusting the industrial structure becomes the point of penetration of economic development.This thesis constructs a theoretical framework of industrial diversification, urban functional character and economic development, and then attempts to carry out a discussion on the function of urban industry structure and functional character in terms of economic growth and economic stability.In order to test the theoretical hypothesis, this thesis collects the panel data of Yangtze River Delta and Zhongyuan urban agglomeration from the year of 2003 to 2012, analyzes them empirically, and finally gets the conclusions as follows. Firstly, it depends on the effect of urban functional specialization adjustment whether the related diversification could stimulate economic growth or not; secondly, investment portfolio effect of unrelated diversification is irrelevant to urban functional character, and the function of related diversification in the employment market varies with the economic cycle; thirdly, the gap of urban industrial structure and functional character of different areas is very large, therefore, we should make industrial policies in accordance with the time and the place to promote the development of urban economy.

摘要： 自2008年国际金融危机后，我国经济进入了波动调整期，在外部需求疲软、内部投资空间缩小、人口红利不断弱化的环境下，调整产业结构成为经济发展的突破口。构建产业多样化、城市职能特征与经济发展的理论框架，从经济增长和经济稳定两个方面，探讨城市产业结构和职能特征的作用。为检验理论假设，收集2003-2012年长三角和中原城市群的面板数据，进行实证分析，得出结论：相关多样化是否能促进经济增长，依赖于城市职能专业化调节效应的发挥；无关多样化的投资组合效应与城市职能特征无关，而相关多样化在就业市场中的作用，随经济周期变动；不同地区的城市产业结构和职能特征差距较大，应因地因时地制定产业政策促进城市经济发展。