Abstract-Based on detection of the Self-vibration and forced vibration the causes of resonant vibration on vibration are examined and analyzed, in order to improve the seismic capacity of coal preparation plant, the safety and normal use performance of coal preparation plant is guaranteed. The experimental result indicated that the reason make the device below the beam plate produce resonance is bending force of screening machine, the interference frequency of the screening machine is close to the first mode of the self-vibration while dynamic response increases of concrete along with the Stiffness of secondary beam and frame beam differ considerably.