The invention belongs to the field of building steel structures and discloses a single-side buckling-restrained steel beam column connection node and a steel-structure building. The single-side buckling-restrained steel beam column connection node comprises a steel beam and a steel column, and a hinge connector and an energy consumption element are arranged at the joint of the steel beam and the steel column. The hinge connector comprises a first connection plate and a second connection plate, the second connection plate is hinged to the end of the first connection plate, the first connection plate is connected to a top flange of the steel beam, and the second connection plate is connected to a flange of the steel column. The energy consumption element is connected with both a bottom flange of the steel beam and the flange of the steel column, and the middle of the energy consumption element is a weakened area. The single-side buckling-restrained steel beam column connection node and the steel-structure building have advantages that an excellent anti-seismic performance is realized, damages of the connection node can be controlled, the steel beam and the steel column are not damaged after an earthquake, and the energy consumption element can be quickly replaced and repaired on the premise that an original structure (such as a floor) is not damaged.