In the agricultural production process, a screening device is often required to screen agricultural crops. In the existing filter screening device, the crops are usually poured at one time during the use process, so that the crops are piled up and the materials above It is difficult to be screened. In order to overcome the above technical problems, Dayong Vibration Equipment Co., Ltd. provides an agricultural screening machine. The basic principle is to install a center of gravity hammer on the upper and lower ends of the equipment motor. This movement is transmitted to the mesh surface to achieve the purpose of screening. At the same time, changing the phase angle of the upper and lower weights of the motor can change the movement direction of the raw materials. Different movement directions produce different screening effects and different main purposes, including Rough grading, general sieving, precision grading, special purpose, etc. Meet different purposes of crop screening.