The vibrating integrity of slabs of plunge pool under the hydrodynamic loads during flood discharge can reflect the integrity of the bottom structure to certain extent. Study on the correlation characteristics of the bottom during flood discharge can provide important reference for identification of the integrity of plate structure. Based on the prototype observation data of slabs with energy dissipation by hydraulic jump, the paper analyzed the correlation characteristics of vibration during flood discharge. The results show that the correlation of flood discharge vibration of slabs is better when the structure of slabs is best. The correlation coefficient between adjacent points is more than 0.8. Under the same spillway condition, the longitudinal spatial scale in axis bottom is the largest and the transverse spatial scale takes the second place,while the longitudinal spatial scale on the right bank is the least.