The utility model relates to a connected node of lower bearing rotation type precast concrete outer wall and girder steel, the upper end of bearing node is pre -buried in the precast concrete outer wall under it, and the lower extreme welds on the girder steel, it is pre -buried in the precast concrete outer wall to go up connected node one end, and other end anchor is on the girder steel, the bearing node includes load -bearing substrate, bearing built -in fitting and hangs and detain the steel sheet down, load -bearing substrate includes vertical steel plate and stiffening rib, a vertical slotted hole is seted up to one side of vertical steel plate, hang knot steel sheet both sides and weld a vertical regulating plate respectively, horizontal slotted hole is seted up to welding level(l)ing board on each vertical regulating plate on one of them level(l)ing board, sets up the round hole on another level(l)ing board, vertical steel plate is connected to on the vertical regulating plate through a horizontal high strength bolt, a spiro union bolt in the round hole, bolt butt in vertical steel plate one side. The utility model discloses not only can improve the whole industrialization degree of steel construction building, impel the development of the prefabricated mounting technology of china's steel construction building simultaneously.