The characteristics and mechanism of parallel polygonal line groove multilayer winding drum were investigated by an experimental approach. Strainelectricity method was used to test the stress of the cylinder body and the end plates of the drum. Experimental results show that the distribution of the axial bending stress on cylinder body is symmetric in the radial symmetry section. The largest axial bending stress appears in the symmetry plane; however the minimum stress is in the sections close to the end plates on both sides. The axial bending stress of the cylinder body is found to grow with the number of layers wrapped around the drum increasing, while the increment of the stress decreases. When the layer number of the wire rope increases from 4 to 5, the increment of the stress is less than 3[MPa].
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