The invention provides an automatic charging unmanned aerial vehicle for power line inspection. The automatic charging unmanned aerial vehicle is characterized by comprising a battery compartment, a driving mechanism and a special plug, wherein the battery compartment is positioned at the bottom of the unmanned aerial vehicle; the driving mechanism is positioned inside the battery compartment; the battery compartment comprises a compartment body, a storage battery, a hinged compartment door and compartment door connecting rod; the compartment body comprises a downward opening; the storage battery is positioned above the interior of the compartment body; the hinged compartment door is opened from two sides to the middle; one end of the compartment door connecting rod is hinged with the inner walls of the compartment door; the driving mechanism is positioned below the storage battery inside the battery compartment; the lower side of the driving mechanism is connected with the special plug; the special plug comprises a plug body, a wire, a landing bracket and a conductive bar; the plug body is connected with the wire; the other end of the wire is connected with the storage battery; the lower side of the plug body is hinged with the other end of the compartment door connecting rod; two sides of the plug body are connected with the landing bracket; and the bottom of the landing bracket is connected with the conductive bar. According to the automatic charging unmanned aerial vehicle for power line inspection disclosed by the invention, the charging part of the unmanned aerial vehicle can be prevented from being influenced by outside weather, and the joint problem of the connector and the interface in the process of charging the unmanned aerial vehicle can be well solved.