The utility model discloses a steel structure factory building sets up connecting piece relates to connecting piece technical field, including main body mechanism, the side of main body mechanism is provided with shock -resisting mechanism, and the top of main body mechanism is provided with connecting mechanism. The utility model discloses by setting up the shock -resisting mechanism who consists of inclined support, fixed block, filler block, shock -resisting shell can play the role of resisting the inflection between connecting piece and the support beam of factory building, when needing to use, only need to fix the fixed block of shock -resisting mechanism and the connecting part of connecting vertical pole and fixed block fixed connection with no.