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This paper presents a kind of assembled steel structure with H-section beam to square steel pipe column bolted double-splint connection, which is easy to be repaired after earthquake. The existing research shows that the connection has good seismic performance. In order to verify the reparability of the connection after earthquake, and get the seismic performance after repairing of the connection, this research has carried out six groups of quasi-static tests on H-section beam to square steel pipe column bolted double-splint connections which were simply repaired after damage by replacing the bolts with new ones and applying pretension force. The hysteretic performance, skeleton curve, ductility and failure mode of the repaired connections were obtained, and the results were compared with the original connections. The results show that the slip length has increased after being simply repaired, and the capacity of energy dissipation in hardening stage is slightly lower, but still has better bearing capacity, deformation capacity and energy dissipation capacity. The rotation ability of the connection is also enhanced, whose limit angle has reached 0. 09 rad, meeting seismic requirements. [ABSTRACT FROM AUTHOR]