3D printing technology has unique advantages over traditional manufacturing technology in the manufacturing of complex parts, and its successful application in the field of battlefield equipment repair provides technical support for this field. Based on the development goal of equipment maintenance support system under the new form of war and combat mode, the important role of 3D printing technology in the construction of new equipment support system is discussed. Taking the angle regulator of a certain type of equipment as the research object, its structural characteristics and functional characteristics are analyzed, and its structure is optimized. The results show that the 3D printing technology has feasibility applied to battlefield repair under the background of actual combat.