分析了用于计算椎挂输送机双层吊装梁强度和刚度的两种力学模型。单根连续梁力学模型计算简便但精度低;双层梁力学模型计算精度高,能全面地反映上、下层吊装梁的材料、布置方式和载荷分布对吊装梁弯矩和挠度的影响。结合实例分析了两种模型的特点。 The two mechanical models used to calculate the strength and stiffness of the double-ply hoisting beams of the spin conveyor are analyzed. The mechanical model of a single continuous beam is simple but has low accuracy; the mechanical model of double-layer beam has high calculation accuracy and can fully reflect the influence of the material, arrangement and load distribution of the upper and lower lifting beams on the bending moment and deflection of the lifting beam. Combined with examples to analyze the characteristics of the two models.