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The quality of intertillage and ridging operations in sugarcane has a significant impact on promoting the growth of sugarcane plants, lodging resistance and increasing yield. Traditional sugarcane intertillage ridges with equal row spacing have poor ridging effects on sugarcane planted in the wide-narrow row pattern, which is prone to causing the “volcano mouth” phenomenon in the narrow-row sugarcane ridges. In response to the above problems, a vertical screwfeeding culticator-hiller for sugarcane in widenarrow row was designed;according to the ridging agronomic requirements under the widenarrow row planting pattern, the structure of key components and the range of operation parameters were determined through theoretical calculations;in the context of using EDEM software, the test factors included the rotary tillage depth, screw-feeding device rotation speed, and travel speed, with the ridging height and operation power consumption as the test indicators. The simulation results showed that the rotary tillage depth, screw-feeding machine rotation speed, and travel speed had significant effects on the ridging height and operation power consumption;when the travel speed was 4km/h, the interaction between the rotary tillage depth and the screwfeeding device rotation speed did not significantly affect either the ridging height or the operation power consumption. The optimal operation parameters obtained were as follows: the rotary tillage depth was 274mm and the screw-feeding device rotation speed was 245r/min. Through field tests of the prototype, the accuracy and reliability of the simulation results were verified. The field performance test results were as follows: the average ridging height was 134.4mm, the qualified rate of ridging height was 100%, the sugarcane injury rate was 5%, the weeding rate was 90%, and the narrow rows of canes formed a turtleback ridge at the base after cultivation, without crater shape, which met the ridging operation requirements under the wide-narrow row planting pattern.