Non-metallic modular prefabricated cabin-type substation is a novel power equipment system that utilizes basalt fiber composite prefabricated components as enclosure structures. Strengthening research on the life-cycle carbon emissions of such equipment holds significant implications for achieving green and low-carbon construction of substations, promoting the widespread application of innovative products, and advancing the sustainable development of the power equipment manufacturing industry. This study employs the Life Cycle Assessment (LCA) methodology to establish the system boundary for carbon footprint evaluation of non-metallic modular prefabricated cabin-type substations. By integrating the production, manufacturing, construction, and operational characteristics of modular prefabricated cabin substations, a life-cycle carbon footprint analysis model and computational workflow are developed. Using an actual engineering project as a case study, carbon emission data across all product life-cycle stages are systematically collected, calculated, and analyzed. This provides a scientific foundation for precisely understanding the carbon emission profile of non-metallic modular prefabricated intelligent substations.