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In the design and calculation of staggered steel truss structure, we always assume that truss chord and pillars is hinged while longitudinal beam and pillars is rigid-jointed. But each connection mode in engineering has certain rotary stiffness, they can't completely meet the design requirements. In this paper, 8 finite element models are established with different connection stiffness to compare the effects to the structure performance. In order to explore how the node connection stiffness influence the multi-layers staggered steel truss structure stress on the performance of the law, this paper provide the theory basis for the structure design and construction research.