Fushun regional transmission line fault location system design and implementation is introduced in this paper by power Supply Company applying. It is based on 3G communication transmission line fault online monitoring system. In a few minutes after a failure, the type of fault and the fault of the specific position can be given quickly on monitor screen at the control center while the short message information is sent to the relevant personnel on the phone, so that maintenance personnel accurately and quickly rushed to the scene, troubleshooting. The work efficiency is improved and the outage time is shortening by the application of the system.