【Objective】Cyclocarya paliurus is a multifunctional tree species. This study investigated the impacts of biochar types and their addition doses on soil chemical properties, leaf photosynthetic pigment content, and growth of C. paliurus seedlings, aiming to provide a scientific basis for biochar application in future C. paliurus plantations.【Method】A two-factor randomized block experimental design was employed to investigate the effects of three biochar types (C. paliurus biochar, straw biochar, and bamboo biochar) and three application rates (5%, 15% and 25% V/V, equivalent to 1.0%, 3.5%, and 6.5% m/m) on soil chemical properties, seedling growth, and leaf photosynthetic pigment content through a pot experiment.【Result】After 200 days of treatment, biochar application significantly increased soil pH, ammonium nitrogen, nitrate nitrogen, available phosphorus, and available potassium levels, while also enhancing chlorophyll a, chlorophyll b, and carotenoid contents in C. paliurus leaves. Application rate had a more pronounced effect on soil chemical indices than biochar type (P<0.05). Notably, adding 25% C. paliurus biochar increased soil pH by 32.1%, and 25% straw biochar significantly elevated available phosphorus and potassium levels by 145.3% and 250.0%, respectively, compared to the control. Biochar application also significantly influenced seedling growth and biomass production (P<0.05), with the 5% C. paliurus biochar treatment showing the most notable promotion in biomass production. Compared to the control, biomass in leaves, stems, roots, and total increased by 55.6%, 47.6%, 43.0%, and 47.0%, respectively, in the 5% C. paliurus biochar treatment. Correlation analysis revealed that seedling height and diameter growth were significantly positively correlated with leaf photosynthetic pigment contents. Additionally, all photosynthetic pigments were significantly and positively correlated with soil nitrate nitrogen (P<0.01), while only soil available potassium showed a significant correlation with carotenoid content (P<0.05).【Conclusion】Appropriate biochar application effectively enhances soil fertility and promotes C. paliurus seedling growth. Among treatments, the 5% C. paliurus biochar application proved optimal for maximizing biomass production.