The invention relates to a recognition method and device of a fault section of an extra-high voltage GIL-overhead mixed circuit. The method and the device are characterized in that the method comprises steps of acquiring the positive sequence voltage and the positive sequence current at a measurement point between a power grid and a first section of overhead power transmission circuit, and the positive sequence voltage and the positive sequence current at a measurement point between a power grid and a second section of overhead power transmission circuit; according to the positive sequence voltage and the positive sequence current at the measurement points between the power grid and the first and second sections of overhead power transmission circuits, determining fault recognition function values of the first section and the second section; and determining a fault position in the extra-high voltage GIL-overhead mixed circuit. According to the invention, in order to ensure power supplyreliability and safety of electrical appliances to the greatest degree, after the extra-high voltage GIL-overhead mixed circuit fails, through positive and negative results of the fault recognition functions, the fault region is precisely judged and judgment basis is provided for implementation of an optimized coincidence decision.