Abstract: Considering that the flip-flow screen panel under heavy load is in tension, and ignoring the difference of the screen panel movement in the width direction, an elastic string model is established for the horizontal flip-flow screen panel driven by one end, furthermore, the differential equation of the screen panel lateral vibration is derived. Using the numerical method to solve the vibration differential equation, five detection points are arranged in the length direction of the screen panel, comparing the calculation results with the simulation results of the finite element software ABAQUS, it is found that the relative error between the calculated and simulated displacement and time curve of each detection point is small, and the lateral movement period is approximately equal to the excitation period; At the midpoint of the screen panel, the relative error between the calculation period and the simulation period does not exceed 0.2%; Comparing the average amplitude of ten cycles at the midpoint of the screen panel, it is found that the relative error is no more than 12.8%, which verifies the feasibility and accuracy of the elastic string model to analyze the lateral movement of the flip-flow screen panel under heavy load.