中文摘要：

工业结构优化升级是振兴东北老工业基地的一项核心任务。基于对区域工业行业结构、所有制结构、企业规模结构动态变化的定量分析，总结了1990年以来东北地区工业结构演变特征与存在的问题，分析了区域工业结构演变的主要驱动因素，并探讨了区域工业结构优化升级的发展方向。研究表明：1990年以来东北地区工业结构调整在解决体制性矛盾、发挥存量优势方面成效明显，在政府支持、外资驱动、市场需求拉动以及资源环境压力等因素的影响下，东北地区工业结构高加工度化发展趋势初步显现，重工业比重持续上升的态势得到遏制，工业所有制结构调整阶段性效果显著，所有制结构单一的现象得到改善，企业规模分化现象近年来表现出下降趋势，大型工业企业主导工业发展态势的局面正在逐步改变。但偏重的工业结构未发生实质性改变，优势工业行业构成变动不明显，多数新兴工业行业规模较小，高技术产业发展滞缓，推动区域工业结构优化升级的内生性动力不足，工业结构优化升级与拉动就业之间的矛盾开始凸显。

英文摘要：

As the first heavy industrial base of China, the development of northeast China has went through fast growth under the old planned economy system and the regional revitalization since the implementation of open-up policy. The upgrade and optimization of industrial structure, one of the core missions facing the revitalization of northeast old industrial base, have received many attentions from both researchers and policy makers. Many studies focused on the unique process and mechanisms of the industrialization of northeast China argued that great progress have been made in the upgrade and optimization of industrial structure since 1990s, but without further elaboration in details. So the paper focuses on the main characteristics and driving factors of industry structure evolution in northeast China since 1990, and attempts to provide some suggestions on the future upgrade and optimization of in- dustrial structure in northeast China. The quantitative analysis of industry structure evolution since 1990 indicates that significant progresses have been achieved under the support of central government, foreign investment, market demand and the influence of regional environmental pressure, which can be manifest in following aspects. Firstly, the share of manufacture industry in total industrial output value increased while the proportion of mining industry declined significantly, the processing degree of industrial development had been strengthened. Secondly, the as- cending share of heavy industry in total industrial output value had been curbed, promoted by the development of food processing industry, medical industry, communication and electronic equipment manufacture industry, the proportion of light industry increased slightly. Thirdly, the reformation of industrial ownership structure achieved re- markable success, more and more non-public ownership enterprises, such as stock enterprises, private and joint ownership enterprises, foreign and Hong Kong, Macao, Taiwan investment enterprises, emerged during the re- se