To explore the effects of typical Torreya grandis intercropping systems on soil carbon (C), nitrogen (N), and phosphorus (P) content and their stoichiometric characteristics on sloping farmland in the Three Gorges Reservoir Area, three typical intercropping systems, T. grandis (TG), T. grandis-Polygonatum sibiricum (TGP), and T. grandis-Glycine max (TGG), were selected in the T. grandis planting bases located in Baoping Town, Yunyang County, Chongqing. The contents of C, N, P in soil and their ecological stoichiometric characteristics under different models and soil depths were analyzed. The results showed that there was no significant difference in soil C content among different systems. Both N and P contents followed the order of TGG (0.80, 0.53 g/kg)>TGP (0.71, 0.40 g/kg)>TG (0.56, 0.39 g/kg), and compared with TG, N and P contents of TGG were significantly higher by 42.9% and 35.9%, respectively. Soil C and N mainly concentrated in the 0-10 cm soil layer, while P mainly concentrated in the 10-20 cm soil layer. Soil C∶N, C∶P and N∶P under the three systems was 8.39~10.73, 31.63~45.22 and 3.25~5.61, respectively, which were all lower than the national average values (14.4, 136.0, 9.3). And the N∶P ratio was less than 10, indicating that N was the limiting nutrient in the study area. The results of the correlation analysis showed that soil pH, bulk density and total porosity were also important indicators affecting soil C, N, and P contents and their ecological stoichiometry. T. grandis intercropping systems significantly enhanced the accumulation of soil nutrients. The content of C, N and P of TGG was higher than that of TGP and TG, and TGG showed better fertilizer cultivation effect.