建筑业企业是建筑市场经济活动的主体，为了适应社会化大生产的客观需要，为了实现规模经济和适应市场竞争的需要，各地通过横向联合和专业分工，组建了一批建筑企业集团，对于促进企业组织结构的调整，推动生产要素的合理流动、充分发挥国有大中型企业的主导作用，形成群... The construction industry enterprises are the main body of the construction market economic activities. In order to meet the objective needs of large-scale social production, and in order to achieve economies of scale and meet the needs of market competition, various localities have established a number of construction enterprise groups through horizontal integration and professional division of labor. The adjustment of the organizational structure of enterprises will promote the rational flow of production factors, give full play to the leading role of state-owned large and medium-sized enterprises, and form groups...