所有制改革是我国经济体制改革所要解决的核心问题。改革开放以来,在经济模式从计划经济向市场经济转型的过程中,我国积极探索公有制新的实现形式,不断推进混合化方向的改革,产生了混合所有制这一新的所有制形式,促进了混合所有制经济的发展,所有制结构与所有制形态也因此发生了巨大变化,形成了以公有制为主体、多种所有制经济成分共同发展的局面。本文以北京为例,对新时期公有制经济混合化改革的几个阶段进行分析,把握主要内涵和 Ownership reform is the core issue to be solved in the reform of our economic structure. Since the reform and opening up, during the transition from a planned economy to a market economy, our country has actively explored new forms of public ownership and continuously pushed forward reforms in the direction of mixing. This has resulted in a new form of ownership of mixed ownership and promoted the development of mixed ownership As a result, great changes have taken place in the development of economy, the structure of ownership and the pattern of ownership, resulting in the common development of various sectors of the economy with public ownership as the mainstay. Taking Beijing as an example, this article analyzes the several stages of the mixed reform of public-owned economy in the new era, grasps the main connotation and