The invention discloses a transmission line fault location module, which belongs to the technical field of transmission lines. The transmission line fault location module comprises a data maintenance module, a fault location module, and an operation abstraction module. The operation abstraction module maps transmission line data imported by the data maintenance module to an electronic map to form an electronic map at least including high-speed rails, highways and important transmission channels. The fault location module calculates out the line length from a transmission line fault point to a substation based on transmission line recording data. The operation abstraction module displays the location of the fault point and the environment around the fault point on the electronic map containing the transmission line data according to the calculation result of the fault location module to help a dispatcher to learn about the environment around the fault point quickly and issue a dispatch instruction in time.