When utility tunnels traverse active faults, it is necessary to comprehensively consider the combined effects of fault interfaces and ground subsidence on their seismic performance. A quasi-static loading test was conducted to evaluate the seismic performance on active ground fissure sites of prefabricated utility tunnel. The test evaluated the failure patterns, deformation characteristics, and hysteretic response of the utility tunnel under transverse horizontal loading. Damage evaluation indices were established to quantify the performance state of the utility tunnel. While a numerical model were developed to simulate various ground fissure site scenarios, which indicated that the dynamic response of the utility tunnel is more likely to appear near the ground fissure, diminishing with distance, while the hanging wall exhibiting a more significant response than the footwall. Moreover, structural damage exacerbate with the increase of ground fissure. At a ground fissure subsidence of 250 mm, the maximum inter-story drift ratio of the utility tunnel reached 1/93, which is 3.16 times and 3.96 times greater than that of a site without subsidence and a complete site, respectively. A seismic vulnerability model for the utility tunnel was constructed using the incremental dynamic analysis (IDA) method, incorporating 16 ground motion records. This model evaluates the failure probability of the utility tunnel"s seismic performance under coupled effects of varying ground motion intensities and ground fissure subsidence. The results provide valuable insights for the seismic design and disaster mitigation of prefabricated utility tunnels in active ground fissure zones.