To study the site hazard effect induced by the dynamic interaction among ground fissure, metro tunnel, and surrounding rock under the load of subway vibration, the geological environment of the ground fissures in Xi'an and the actual engineering design of Xi'an Metro Line 2 were selected as the background. A physical model test with a similar scale of 1:5 was designed using the similarity theory. Then the shield tunnel, surrounding rock material, and ground fissures were reasonably designed. A vibrator was used in the model test to simulate the load of metro train vibration, and fixed-point excitation and moving-point excitation were both applied to analyze the dynamic response among ground fissure, metro tunnel, and surrounding rock under subway vibration load. The analysis results can provide a scientific basis for the safe running of subways.