Abstract: In order to improve the problems of linear vibrating screen life and improve the operation process, such as plate cracking, sieve beam and vibrator beam fatigue fracture failure.In this paper, ZKB1548 linear vibrating screen as the research object, using Solidworks software to build three-dimensional solid model, using ANSYSWorkbench software for modal analysis.It is known that the natural frequency of the linear vibrating screen is close to the working frequency.Using ANSYS to optimize the structure of the vibrating screen, so that the working frequency of the screening machine has a certain safe distance with the natural frequency of the structure, so as to ensure the reliable operation of the screen machine.