Combined section structure for steel structure column beam

The utility model relates to the technical field of steel structure columns and beams, and discloses a combined section structure for a steel structure column and beam, which comprises main beams and support beams arranged between the main beams, the outer surfaces of the support beams on two sides are provided with bunching grooves, the inner sides of the main beams are provided with slots for installing the support beams, the slots are internally provided with U-shaped plates, and the U-shaped plates are arranged in the U-shaped plates. The upper end of the U-shaped plate is provided with a movable pile which is movably installed, the inner side of the U-shaped plate is provided with a spring which is movably installed, the lower end of the movable pile is provided with a magnet piece which is fixedly installed, and the lower end of the slot is provided with an electrified magnet. When the main beam and the supporting beam need to be disassembled, after the positive pole and the negative pole of the electri