[目的/意义] 研究中国内地31个省区在社会科学合作中实力和地位的变化过程，有利于相关部门掌握省区间的社会科学合作动态，为科技管理者布局地区研究规划、进行科学决策提供参考依据。[方法/过程] 利用1998-2017年中国SSCI论文数据，构建中国内地31个省区间社会科学合作网络，运用社会网络分析和多维标度方法，分析省区间社会科学合作网络核心-边缘结构的演化过程。[结果/结论] 1998-2017年中国内地31个省区间社会科学合作强度逐步提高；省区间社会科学合作网络具有明显的核心-边缘结构，越来越多的省区加入到合作网络的核心、半核心区域，边缘区域省区的数量大幅减少；各区域社会科学合作研究的主要领域是经济与商学、心理学、健康学与环境学；内地跨省区的社会科学合作主要集中在核心区域中的省区之间、核心区域与半核心区域的省区之间。

[Purpose/significance] To study the changing process of strength and status of 31 provinces and regions in the mainland of China in social science cooperation is helpful for relevant departments to grasp the dynamics of social science cooperation between provinces and regions, and can provide reference basis for scientific and technological managers to layout regional research plans and make scientific decisions. [Method/process] Based on the data of China SSCI papers from 1998 to 2017, the social network analysis and multi-dimensional scale method were used to construct the social science cooperation network among 31 provinces and regions in mainland China, and the evolution process of the core-edge structure of the social science cooperation network among provinces and regions in mainland China was analyzed. [Result/conclusion] From 1998 to 2017, the intensity of social science cooperation among 31 provinces and autonomous regions in Mainland China was gradually increasing. The social science cooperation network between provinces and regions has an obvious core-periphery structure. More and more provinces and regions have joined the core and semi-core regions of the cooperation network, and the number of provinces and regions in the marginal region has been greatly reduced; The main research areas of regional social science cooperation are economics and business, psychology, health and environment; the social science cooperation among the provinces and regions across the mainland has been concentrated among the provinces in the core regions and between the provinces in the core and semi-core regions.