Abstract: The effect of shading rate changes on the quality of one-year Malania oleifera seedlings was studied using 3 shading conditions: 80%, 40%, and no shading(0%), using different light intensities generated by shading nets. The results showed that as the shading rate increased, the seedling ground diameter, leaf number, main root length, primary root number, primary root length, and biomass of each organ first increased and then decreased; there are significant differences(P<0.05) in biomass allocation among different organs of M. oleifera seedlings under different shading rates. This is reflected in the fact that when the shading rate is 80%, the aboveground biomass is more allocated and less allocated to the root system. As the shading rate decreases, M. oleifera seedlings choose to prioritize root growth; a high shading rate can limit the growth of the root system of M. oleifera seedlings, while conversely, it can make it difficult for the aboveground parts to develop. When the shading rate is 40%, the development of M. oleifera seedlings is balanced and the quality is the best.