中文摘要：

根据城乡收入比和ER型指数测算结果,将长三角67县（区）分为4类,分析2006~2013年城乡收入两极分化程度,发现其存在明显的时空演变和地区分异特征,2006~2013年,长三角地区ER型指数整体呈上涨趋势,大部分地区城乡收入两极分化程度越来越严重。城乡收入极化程度各类型区的空间分布情况也随之发生了明显变化,极化程度在不同类型区的分布存在明显差异。省域间城乡收入极化程度差异也较大,上海市和江苏省极化程度呈上升趋势,浙江省变化较为平缓,且程度减弱的县（区）数量较多。

英文摘要：

According to calculation for the urban-rural income ratio and ER index, 67 counties in Yangtze River delta were classified into 4 types of areas to analyze the polarization degree of urban-rural income in 2006 ~2013. The analysis results showed obvious temporal-spatial evolution and regional differentiation characteristics, as whole the ER index of Yangtze River Delta showed upward trend, and the polarization degree of urban-rural income in most areas was more and more serious.Thereupon the spatial distribution situation of urban-rural income polarization in various types of areas have changed apparently, and the distribution of polarization degree in different types of areas existed significant difference. In addition, the polarization level of urban-rural income also exists significant difference in various provinces, the polarization degree of urbanrural income in Shanghai and Jiangsu province showed upward trend, and in Zhejiang province the change was relatively stable, as well there were high numbers of countries with weakened polarization degree of urban-rural income.