Considering the dynamic interaction among receivers， pedestrians， and the structure， a pedestrian-floor-receiver full-path interaction vibration model is established. The vibration serviceability of the lightweight floor is evaluated in the form of probability. The excessive vibration of the floor is controlled by elastic constraints. To demonstrate the effectiveness of the elastic constraints in mitigating excessive vibration of the floor， a comparison is made with the tuned mass dampers （TMD） control. The DQ-IQ method is used to solve the pedestrian-floor-receiver coupled vibration control equations. The CFS combined floor is used as the computational model to obtain the dynamic response of the floor mid-span and the receiver when the pedestrian walks on the floor at different step frequencies， and the control effects are compared when TMD and elastic constraints are used. The cumulative probability of the floor and the receiver satisfying the serviceability limits under these two control measures were calculated with the serviceability limits as the reference standard. The results show that for the lightweight floor，when the stiffness coefficient is 0.5 and 3， the serviceability probability of the floor increases from 13.57% to 86.98%， and the serviceability probability of the receiver increases from 11.75% to 79.86%， which greatly improves the serviceability probability. It can provide a reference for the selection of rotational stiffness of boundary conditions in design. When the stiffness coefficient is 2， the serviceability probability of the floor is 68.80%， while the serviceability probability of the receiver is only 57.97%， and the difference is 10.83%. The receiver is more likely to have serviceability problems than structures under the same conditions when considering human-induced vibration. Therefore， it is suggested to increase the peak acceleration of the receiver in the serviceability evaluation.