The invention relates to the field of stock cultivating equipment, and in particular relates to a seedling tray for lagerstroemia indica red rocket. The seedling tray mainly comprises a head cover, an upper plate, a plurality of seedling cavities, upright posts, light sources, a plurality of air supply outlet and a controller, wherein the plurality of seedling cavities are formed in the upper end surface of the upper plate; the upright posts are supported under four corners of the upper plate; one light source is arranged between every two upright posts; the head cover is also arranged at the upper part of the upper plate; the plurality of air supply outlets are also formed in the head cover; the controller is arranged on the edge of the upper plate; the seedling cavities are in a columnar structure; a plurality of bumps are arranged on the inner surfaces of the seedling cavities in a spiral manner; and a plurality of holes are formed in the outer surfaces of the seedling cavities. According to the seedling tray, growth of roots can be promoted by the light sources arranged at the lower part; sunshading can also be achieved through the head cover at the upper part; temperature control on the upper seedlings of the lagerstroemia indica red rocket and control on the lower illumination are achieved by the air supply outlets in the head cover; upper temperature and lower illumination are ensured; and the survival rate of a single plant is improved by air and water permeability of each seedling cavity, so that the overall survival rate is ensured on the whole.