介绍了一种三轴变椭圆轨迹等厚振动筛。针对该振动筛,建立了其三自由度动力学模型、振动微分方程及筛箱任意点运动方程,在理论上证明了筛面变椭圆运动的正确性,为进一步研究和实际的产品设计提供了理论依据. A three-axis variable elliptical trajectory equal thickness vibrating screen is introduced. For the shale shaker, the three-degree-of-freedom dynamics model, the vibration differential equation and the equation of motion of the screen box are established. The correctness of the elliptical movement of the screen surface is theoretically proved, which provides the theoretical basis for further research and practical product design Theoretical basis.