The utility model discloses a few steel pipe support's flat connecting device that allies oneself with, including the peaceful link rod of staple bolt, the circumference of staple bolt is equipped with flat link rod coupling mechanism in the interval on the surface, flat link rod coupling mechanism includes two vertical settings, has a flat link rod connecting plate in clearance each other, the first bolt fastening of flat link rod accessible is between two flat link rod connecting plates. Device simple structure, reliable, ann tears the convenience open, has effectively solved the problem ofoperating difficulties in the construction of flat antithetical couplet, has improved the turnover rate of material, has reduced material loss, has promoted the project level of profitability, has accelerated temporary structure's construction speed simultaneously, and for the time limit for a project provides important guarantee, structural stability is good, and factor of safety is high.