本文通过对项目变更的原因进行分析,提出了项目变更的基本审批程序,结合机电安装工程中的项目变更的管理方法,阐述了项目变更的贯穿整个项目的重要意义。由于项目总是在向前发展和变化的,所以在项目实施过程中,总会有一些变更发生,变更的发生会对项目的进度、预算以及所需资源造成影响,变更的失控将造成项目管理的混乱和无序,导致项目的进度不可控制、资源的大量浪费、项目质量的低下,以及最后导致项目 Based on the analysis of the causes of project changes, this paper proposes the basic approval procedure of project changes, and expounds the significance of project changes throughout the entire project, combining with the management of project changes in mechanical and electrical installation projects. Because the project is always moving forward and changing, some changes will always occur during the project implementation. The change will affect the progress of the project, the budget and the resources required. The loss of control will cause the project management Of the chaos and disorder, resulting in the progress of the project can not be controlled, a lot of waste of resources, project quality is low, and finally lead to the project