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In order to solve the problem of high impurity rate and stalk broken rate existing in the leaf-stripping process of the whole stalk sugarcane combine harvester, the elastic dentation roller type leaf-stripping test device was designed. The main structure of feeding roller, output roller and leaf-stripping roller and the principle of leaf-stripping were introduced. The structure parameters of main parts were determined. The orthogonal experiments were conducted to study the influence between the following four factors, the installation angle of leaf-stripping component, the center distance between the top and bottom leaf-stripping rollers, rotate speed of leaf-stripping rollers and rotate speed of feeding and output rollers, and the following three indexes on leaf-stripping quality, impurity rate, stalk broken rate and top broken rate. The result showed that the optimal parameters were as following: the installation angle of leaf-stripping component was 90°, the center distance between the top and bottom leaf-stripping rollers was 310 mm, rotate speed of leaf-stripping rollers equaled 700 r/min and rotate speed of feeding and output rollers equaled 150 r/min. In the meantime, when the total weight of 319.19kg sugarcane was fed continuously into the device in the way of single stalk, the impurity rate, stalk broken rate and top broken rate reached to 1.56%, 20.45% and 65.97%. Otherwise, when the total weight of 274.52 kg sugarcane was fed continuously into the device in the way of three to five stalks simultaneously, the final result was 2.38%, 25.93% and 75.59% respectively. 