The utility model discloses a canned type high -voltage direct -current relay, including insulating boot and yoke, the yoke makes progress to extend to be formed with and is shaft type yoke fixed part, the insulating boot includes the top, and top downwardly extending has the shaft type of being an insulating boot fixed part, top and the cup -shaped structure of insulating boot fixed part cooperation in order to constitute the back -off, the yoke cooperates in order to be formed with the cavity that is used for holding movable contact and stationary contact with the insulating boot, insulating boot fixed part lower extreme with the mutual screw -thread fit of yoke fixed part, the insulating boot fixed part lower extreme outside or insulating boot fixed part lower extreme downside are provided with first sealing washer, insulating boot fixed part lower extreme is filled with the screw -thread fit position of yoke fixed part has sealing glue. The utility model discloses a then electric appliances has the advantage that the leakproofness is high, can guarantee relay performance, reduction in production cost.