Because of the problem that residents along a subway often complain about excessive vibration noise， the conventional fasteners originally used were reconstructed into floating rail fasteners to reduce the impact of vibration and noise. The characteristics of track vibration， vehicle vibration and noise， building vibration and secondary noise are analyzed by measuring the vibration and noise when the train passes through the section before and after reconstruction. As compared with the conventional fastener track before transformation， the root mean square values of the vertical vibration accelerations of the rail， track bed， and tunnel wall of the floating rail fastener track are reduced by 8%， 70.6%， and 71.4% respectively， and the reduction of tunnel wall vibration is the most significant， and the track vibration reduction effect by the tunnel wall vertical vibration is 8.28?dB. The maximum sound pressure level in the bogie area and in the interior is reduced by 3.6% and 3.4%. The average vibration levels of buildings and the secondary radiation noise in the daytime are reduced by 18.4% and 22.0%. The main frequency of vehicle， track and building vibration and secondary noise is highly close to the P2 resonance frequency of the wheel-rail system， which is one of the main reasons for the vehicle， track and building vibration. The research results of this paper provide a greatly important reference for controlling the vibration and noise problems caused by the subway.