Abstract: There are core pain points in the non-ferrous metal smelting project, such as complex process, dense interlaced pipelines and difficult hoisting of large equipment. This study takes the pyrometallurgical system project of the Relocation Project of Southwest Copper Branch, Yunnan Copper Industry Co., Ltd. as the research carrier to explore the integrated innovation paths and practical methods of BIM technology throughout the full life cycle of the project. This study constructs a four-dimensional collaborative integration model of "technology-management-process-platform". In this study, multi-disciplinary fine modeling, pipeline collision detection optimization, key equipment hoisting simulation and factory prefabrication are applied. Through technical integration, the technical problems such as difficult control of equipment installation accuracy, pipeline cross conflict and limited hoisting space are effectively solved. Practical results show that this model can improve design efficiency by more than 35%, reduce construction rework rate by 40%, and lower the pipeline rework rate from the industry average of 18% to 2.7%, achieving a total cost saving of 2.38 million yuan. The proposed method provides a replicable practical paradigm and methodological support for the digital transformation of the non-ferrous metal smelting industry.