Based on American National Ignition Facility (NIF), the spatial layout and structural features of optomechanical components of Nd∶glass laser amplifier are introduced. The field installation equipment and installation process parameters of optomechanical components are dissected. The field installation technologies are studied, such as accurate alignment and rigid connection, guide rail escort during convey, grading lift based on CCD detection and flexible docking. At the same time, the situation of field installation of optomechanical components for similar facility in China is summarized. The results of this study are intended to provide technical support for China′s upcoming large-scale laser-driven inertial confinement fusion facility.