Abstract: Aiming at problems of dense cable distribution, narrow space, and strong electromagnetic interference in complex cable trenches, a digital cable rapid positioning method is proposed. The method uses environment-adaptive scanning technology, combines interference suppression and signal enhancement algorithms, and gets accurate cable identification through multi-parameter parallel acquisition, weighted feature vector construction. Test results show that the method gets a positioning accuracy of 97.2% in complex cable trench environments, and the positioning time is cut by 78% compared with traditional methods, effectively improving the operation and maintenance efficiency of power systems.