The present invention discloses a stop arc structure of a high voltage direct current relay. The stop arc structure includes an insulation plate, a metal magnetic conduction clip in an enclosing structure and a yoke iron sheet. The upper side of the yoke iron sheet is provided with a lower location plate made of an insulation material. The insulation plate, the metal magnetic conduction clip, the lower location plate and the yoke iron sheet are fixed and form a cavity for containing a movable contact and a static contact. The upper end of the metal magnetic conduction clip props against the insulation plate. The lower end of the metal magnetic conduction clip props against the lower location plate. The static contact and the insulation plate are fixed by using a leading out terminal. A lower location block extending upward is formed on the lower location plate. The metal magnetic conduction clip is sheathed at the periphery of the lower location block. The cavity is internally provided with two magnetic steels and at least two stop arc sheets made of the insulation material. The two magnetic steels are opposite. The stop arc sheets are in a magnetic steel blowing action direction. The magnetic steels and the stop arc sheets are all located on the lower location plate.