The invention relates to a fusing type direct-current lightning arrester group for a direct-current power transmission system, in particular to an automatic fusing type direct-current lightning arrester group. The automatic fusing type direct-current lightning arrester group has the characteristics that the automatic fusing type direct-current lightning arrester group comprises at least two direct-current lightening arresters which are mounted in parallel; the two ends of each of the direct-current lightening arresters which are connected in parallel are respectively connected with a high-voltage end and a grounding side of protected equipment, wherein a fuse is connected in series beside each direct-current lightning arrester. The automatic fusing type direct-current lightning arrester group has the beneficial effects that the potential end of each direct-current lightning arrester is connected in series with a fusing device which is matched with the characteristics of the direct-current lightning arrester; when the characteristic actual effect of a single direct-current lightning arrester faces breakdown, the characteristic actual effect is automatically isolated from the system; in a direct-current system, a plurality of lightning arresters are connected in parallel and are all configured redundantly, so that the performance of each direct-current lightning arrester is not influenced after the single direct-current lightning arrester is isolated from the direct-current lightning arrester group, and the single direct-current lightning arrester can operate in the system continuously; a direct-current system locking accident caused by the breakdown of the single direct-current lightning arrester in a direct-current system is avoided effectively.