LNG模块化工厂建造中各项技术等级最高的就是核心工艺模块的建造,其建造过程需要对大量机械设备进行精确的定位控制测量。本文以国内首个核心工艺模块项目为例，从甲板梁预制阶段到设备底座总装阶段，再到设备就位安装阶段，对核心工艺模块大型设备安装就位测量方法进行了探讨。基于测量技术中的后方交会原理，给出了机械设备安装尺寸测量的技术方法。

 In the construction of LNG module plant, the highest technical level is the construction of the core process module, The construction process requires precise positioning control measurements for a large number of mechanical equipment. This paper takes the first core process module project in China as an example, from the deck beam prefabricated stage to the equipment base erection stage, and then to the equipment installation stage, discussing the dimension surveying method about the large equipment on core process module. Based on the principle of the resection in the measurement technique, the technical method for the installation of the mechanical equipment is given.