Abstract: Transformers are the core devices of substation engineering. The installation and debugging effect directly affects the quality of power transmission and transformation. The article starts from the fault defects of a transformer during the operation of a 110 kV substation, and studies the lifting process and accessory installation operation of the transformer body in substation engineering. Optimize installation techniques and debugging processes based on safety standards and technical specifications. To ensure the safe, reliable, and stable operation of the main transformer in the 110 kV substation project.