<p>Aiming at the quality bottlenecks of traditional grouting sleeves in construction, such as insufficient grouting compactness and duct blockage, this paper proposes a new type of non-porous structural grouting sleeve connection technology. Through refined numerical simulation, a systematic comparative study is conducted on the seismic performance of prefabricated beam-column joints using this connection technology and traditional cast-in-situ joints. The research results show that the new connection joints and cast-in-situ joints exhibit highly equivalent mechanical properties in terms of hysteretic characteristics and skeleton curve features, with displacement ductility coefficients all greater than 3.0, indicating favorable deformation capacity. Although the ultimate bearing capacity and cumulative energy dissipation of the prefabricated joints are slightly lower than those of the cast-in-situ joints, their overall mechanical performance meets the design requirement of “equivalence to cast-in-situ structures”. Damage evolution analysis reveals that the joints eventually present a shear failure mode, and the propagation of vertical cracks at the beam ends towards the core zone is the main cause inducing bearing capacity degradation. Parametric analysis further demonstrates that appropriately reducing the axial compression ratio, increasing the strength grade of longitudinal reinforcement, and enhancing the anchorage performance of grouting materials can significantly improve the energy dissipation capacity and bearing reserve of such joints. This study verifies the seismic reliability and engineering applicability of the new non-porous sleeve connection in precast frame structures, providing a new technical approach for the connection design of prefabricated concrete structures.</p>