The utility model belongs to the technical field of welding and particularly relates to an end plate for pipe welding or thermal treatment. The end plate consists of a silica gel strip, a size-adjustable steel hoop and a sealing cloth, the edge of the sealing cloth is fixed between the silica gel strip and the steel hoop when in use. With the adoption of the end plate for pipe welding or thermal treatment, heat insulation cotton is not used for sealing pipe orifices during welding or thermal treatment of the welded junction and the end plate can be reused, thereby reducing the amount of heat insulation cotton, the cost, as well as damage to the human body by the heat insulation cotton.