Abstract: In this paper, the monitoring of the vibratory characteristics of the arc-shaped service gate in the bottom hole for leading water and the deep hole for sluicing flood in the TGP is introduced in detail. The finding in monitoring of the gate’s vibration caused by the drastic flowing when the bottom hole is sluicing is also introduced. The monitoring indicates that the range of the fluctuating pressure in the bottom of the gate is rather large when the bottom hole is narrowly opened in the course of gates opening and shutting in flowing water. The resting stress in the blade and cantilever of the gate is acceptable, the dynamic stress is very small; and the vibratory acceleration of the gate is rather small, The destructive vibration has never happened.?