The invention relates to a direct current fault detection method for a multi-terminal alternate current direct current hybrid distribution network. The method comprises the steps that the voltage variation rates of current-limiting inductance of each direct current line are calculated after direct-current interelectrode short-circuit and a single-electrode grounding fault of an alternate current direct current hybrid distribution network occur; the voltage variation rates of the current-limiting inductance of each direct current line are compared with a fault detecting threshold value to obtain a detecting result of whether or not a direct-current fault of the alternate current direct current hybrid distribution network occurs; the voltage variation rates of the current-limiting inductanceof each direct current line are compared with a faulty line recognition threshold value to obtain a recognition result of an alternate current direct current hybrid distribution network faulty line;substraction is conducted on the faulty line positive-negative electrode current-limiting inductance voltage variation rate, and the outcome is compared with a faulty type recognition threshold valueto obtain a recognition result of the faulty type of the alternate current direct current hybrid distribution network; substraction is conducted on the faulty line positive-negative electrode current-limiting inductance voltage variation rate, and the outcome is compared with a faulty electrode judging threshold value to judge a direct-current faulty electrode of the alternate current direct current hybrid distribution network.