Abstract: Cable is an important infrastructure of the power system. The safe and reliable laying of cables is the key to ensure the long-term stable operation of the converter station. Cable in the laying process to withstand complex mechanical loads, these loads may lead to cable insulation layer or armor layer to produce local stress concentration, become a potential hidden danger of late operation. Based on this, this paper firstly analyses in detail the cable laying method of the converter station and its influencing factors, and understands the process steps and precautions of cable laying to lay a foundation for subsequent accurate modelling. Secondly, the simulation model is established based on BIM technology. The ant colony algorithm is used to solve the optimal path under the constraints of relevant rules. Finally, a digital construction supervision system is proposed to establish a digital construction supervision collaborative management platform. It combines the three parts of cable channel modelling, cable laying management and project construction management, and integrates the temperature-stress monitoring module to comprehensively grasp the cable laying construction situation. This study provides a new paradigm for the in- depth application of BIM technology in electric power engineering, which has certain theoretical significance and practical application value for improving the quality of cable laying, the level of digital management of power grid infrastructure, and saving manpower and material costs.