Abstract: Main workshop equipment for coal preparation plant, the structure arrangement complex, large equipment (sieve, centrifuges, etc.) are often dynamic load and vibration caused by the operation problems, combining with a project example, for the problems caused by equipment vibration, adopts the traditional simplified calculation (single beam) and the finite element method are compared, the analysis found the cause of the equipment vibration. Results show that the equipment into the material end and discharge end bearing elevation, could be real using finite element method to compute the overall response of the structure of the natural frequency; In addition, from the perspective of reducing equipment for vibration of equipment layout should be decorated on the low side of the building