Abstract: In the report, a novel and efficient prefabricated RC beam-column was proposed. In the joint core area, the post-pouring concrete was used to connect the prefabricated beam and the lower prefabricated column. The connection between the upper and lower prefabricated columns was set above the joint core area, and which was realized by welding steel sleeves pre-embedded at the ends of the prefabricated columns. One prefabricated joint specimen and one cast-in-place joint specimen were designed, and the quasi-static tests were carried out to analyze their seismic performance. The results indicated that the prefabricated joint exhibited bending failure at the beam end, with the column end remaining intact and only two cracks appearing in the joint core area, which conformed to the "strong column-weak beam" design principle. During the loading process, the prefabricated joint went through three stages: linear, elastic, and failure, with the hysteresis curve being the fullest in the elastic stage, which indicated good energy dissipation performance. Compared with the cast-in-place specimen, the prefabricated joint showed a consistent trend of stiffness degradation, with a 7% lower negative peak bearing capacity and a 0.34 lower ductility coefficient.