On lap escalator cantilever floor under pedestrians - escalator coupling is prone to lead the problem of vertical vibration, in a commercial laminated cantilever in the floor as the background, take the field vibration test method, the escalator running, the number of pedestrians and pedestrian movement on the influence of the cantilever floor vibration response, and through the test data of floor structure vibration comfort perception evaluation and personnel. The results show that the movement of pedestrian on escalator is the main reason for the vibration of overhanging roof. The vibration of the roof is more obvious in response to the increase of the number of people accompanying it, but decreases with the increase of the length of the escalator. The peak acceleration was used to evaluate the comfort of overhanging roof, and the vibration response of overhanging roof exceeded the comfort limit when pedestrians ran on the escalator. Use KB (Konstant Beurteilungswerte) value to judge the perception of cantilever floor, when the pedestrian relatively static escalators, the vibration of the cantilever floor not beyond the permissible value perception degrees, when pedestrians are relatively escalator when walking or running, the vibration of the cantilever floor would be beyond the permissible value perception degrees; The movement of people relative to escalators does not cause the overhanging roof to resonate.