The utility model discloses a connecting node structure of a steel column and a structural floor. The joint structure comprises a steel column, a concrete short column, a concrete bracket, equilateral angle steel and a structural terrace plate, a steel column is embedded into a foundation, a concrete short column wraps the steel column to the elevation of a terrace, a concrete bracket is additionally arranged on the periphery of the concrete short column, a structural terrace plate is connected to the concrete bracket, structural terrace plate steel bars are connected with equilateral angle steel welded to the steel column in advance through single-face
welding, and the structural terrace plate, the concrete bracket and the concrete short column are integrally poured. And finally, a stable and reliable-sealing connection node is formed. According to the utility model, the construction is simple, the equilateral angle steel pre-welded on the steel column does not influence the strength and construction of the steel column, the connection is effective and reliable, the terrace reinforcing
steel bar is welded on the equilateral angle steel, and the bracket reinforcing
steel bar is connected with the concrete short column and the terrace reinforcing
steel bar, so that the overall stability and safety of the connection of the terrace and the column are ensured, namely the generation of cracks is effectively reduced; and a good waterproof effect is achieved,
permeation of underground water can be effectively prevented, and then normal production in a
plant is guaranteed.