The invention discloses a movable substation for unmanned aerial vehicle electric transmission line inspection. The movable substation is used for planning and issuing flight tasks, carrying out local monitoring on inspection state information and inspection data, pre-processing inspection image data and carrying out defect pre-diagnosing on inspection result data. The movable substation comprises a human-computer interaction module, an inspection task synchronizing module, a nacelle control module, a GIS module, a flight control module, a flight task planning module, a defect pre-diagnosing module, an image pre-processing module, a meteorology monitoring module, a flight task monitoring module, a data storing module, a GPS module and a communication module. According to the movable substation, the informatization and automation degrees of unmanned aerial vehicle inspecting process and inspecting result processing are enhanced, the efficiency of inspection of an unmanned aerial vehicle is improved, and technology support is provided for safe and reliable operation of unmanned aerial vehicle circuit inspection.