The invention discloses a fabricated self-resetting basic system and belongs to the field of buildings. The fabricated self-resetting basic system comprises a main basic unit and a plurality of auxiliary basic units spliced on the side of the main basic unit. Symmetric stepped countersinks are formed in the upper sides and the lower sides of the two ends of the main basic unit and the auxiliary basic units correspondingly, and vertically through mounting through holes are formed in the bottoms of the countersinks. Upper cross beams are placed in the countersinks in the upper side in a matchedmanner, and lower cross beams are placed in the countersinks in the lower side in a matched manner. The corresponding upper cross beam and lower cross beam on each side are connected through a bolt. Holes are formed in the middle of the main basic unit and the middles of the auxiliary basic units, and the main basic unit and the auxiliary basic units are connected together through pretension shapememory alloy screw rods. The fabricated self-resetting basic system has the beneficial effects of being simple in fabrication process, convenient to transport, convenient to assemble, fast to construct, capable of being freely fabricated, good in self-resetting performance and the like. According to different stress requirements, different basic units and cross beams can be combined, overall scheme changing is not needed, construction efficiency is improved, and cost is reduced.