Abstract: 【Objective】 The study aimed to systematically investigate the effects of cassava-vegetable soybean intercropping on cassava growth and the performance of the intercropping system， and to elucidate its potential advantages， which could provide scientific evidence for addressing the low self-sufficiency rate in cassava industry of China and to offer theoretical guidance for improving land use efficiency and economic returns in cassava-producing regions. 【Method】 Cassava cultivar Nanzhi 199 and vegetable soybean cultivar Jiaoda 18 were used as experimental materials. The intercropping pattern consisted of two rows of soybeans being planted between cassava rows. Three intercropping treatments were established based on soybean row spacing （0.10， 0.15， and 0.20 m， designated as CS₁， CS₂， and CS₃ respectively）， with cassava monoculture （CC） and sole soybean monoculture （SS） as controls. The effects of different intercropping treatments on cassava growth， crop yield and quality， land equivalent ratio and soil enzyme activities were evaluated. A comprehensive assessment of intercropping treatments performance was conducted using the membership function method. 【Result】 From the seedling stage to the tuber expansion stage， both plant height and stem diameter of cassava in intercropping treatments were significantly lower than those in the CC treatment （P<0.05， the same below）. At tuber maturity， plant height in the CS₁ treatment was significantly higher than that in CC treatment， while no significant differences in stem diameter were observed among treatments （P>0.05）. During the seedling stage， the relative chlorophyll content （SPAD value） and net photosynthetic rate （P_n） of cassava leaves in all intercropping treatments were lower than those in CC treatment. However， at the tuber expansion stage， P_n in all intercropping treatments was significantly higher than in CC treatment， with increases ranging from 18.86% to 37.64%. At tuber maturity， both SPAD value and P_n in the CS₁ treatment remained significantly higher than those in CC. Although intercropping reduced the per-plant yield of individual crops compared with monoculture， it increased the total system yield， improved crop quality， and enhanced overall economic benefits. Notably， the starch content of cassava in intercropping treatments increased significantly by 7.42% to 16.97% compared to CC treatment. Land equivalent ratio of intercropping treatments was 1.68-1.92， indicating a clear intercropping advantage. Moreover， all intercropping treatments exhibited higher soil sucrase， urease， catalase， and acid phosphatase activities compared to monoculture treatment. Among these， soil sucrase， urease， and acid phosphatase activities increased with rising intercropping density. While catalase activity initially decreased and then increased with increasing intercropping density， significant differences were observed among treatments. Based on the membership function， a comprehensive evaluation was conducted on different intercropping treatments. The results showed that the comprehensive scores of intercropping treatments were all higher than those of monoculture treatment， among which the comprehensive evalua-tion index of CS₁ treatment was the highest. 【Conclusion】 The cassava-vegetable soybean intercropping system exhibits significant agricultural production advantages. The optimal intercropping pattern consists of 2 rows of soybeans intercropped between cassava rows with a soybean plant spacing of 0.10 m.