Abstract: To explore the effects of nitrogen (N) and phosphorus (P) addition on the stoichiometric characteristics of nutrient elements (N, P, K) in container-grown Cinnamomum camphora seedlings, one-year-old container-grown C. camphora seedlings were used as experimental materials. An exponential fertilization method was adopted, with fertilization treatments including low N, medium N, high N, P, low N+P, medium N+P, and high N+P, using no fertilization as the control (CK). After the seedlings ceased growth, the biomass and stoichiometric characteristics of nutrient elements (N, P, K) in roots, stems, and leaves were determined.The results showed that the root biomass reached the maximum value of 1.857 g/plant under the P-only treatment, while the stem biomass, leaf biomass, and total biomass under N₃ were significantly higher than those under other treatments. The root N contents of container-grown C. camphora seedlings under N₃, N₂P, and N₃P treatments were significantly higher than those under other treatments, being 23.830 mg/g, 24.712 mg/g, and 24.876 mg/g, respectively. N₂P was the treatment with the highest stem N content (15.035 mg/g). In leaves, except for the P-only treatment, the N contents of other treatments were significantly higher than that of CK, among which N₃ and N₂P treatments had the highest leaf N contents. Applying P alone significantly increased the P content in various organs of container-grown C. camphora seedlings, showing a significant difference from CK, while applying N alone and combined N-P fertilization had little effect on the P content in various organs of the seedlings. Combined N-P fertilization significantly increased the leaf N/P ratio of container-grown C. camphora seedlings, among which the leaf N/P ratio under N₃P treatment was significantly higher than that under other treatments (4.67). In roots, the treatments with higher N/P ratios were N₂P and N₃P, being 6.18 and 6.16, respectively. N2P was the treatment with the highest stem N/P ratio (4.27). Overall, N₂P and N₃P treatments were more conducive to increasing the N/P ratios in roots, stems, and leaves of container-grown C. camphora seedlings. Fertilization had no obvious effect on increasing the K content in the underground parts of container-grown C. camphora seedlings, and the effect was mainly concentrated in the aboveground parts, especially leaves. Moreover, combined N-P fertilization had the greatest promoting effect on the leaf K content of container-grown C. camphora seedlings. Under N₂, N₃, and N₂P treatments, N/K>2.1 and K/P<3.4 were satisfied, indicating that the roots of container-grown C. camphora seedlings were limited by K.Therefore, the limiting factor for the growth of container-grown C. camphora seedlings is N limitation. Applying N alone or combined N-P fertilization can significantly increase seedling biomass, change the N/P ratios in various organs, and alleviate N limitation.