The invention discloses a method for producing seeds of rootstock-used pumpkin in a solar greenhouse. A female parent and male parent planting mode is set and improved in the solar greenhouse, banding relay cropping planting of male parents and female parents on a cultivation ridge with a double-concave structure is realized, male parents do not occupy extra land, the purposes of increasing the planting number of the female parents on the total area of a seed production land parcel and improving a growing environment of male parent and female parent plants are achieved, and yield and quality of the hybrid seeds of the rootstock-used pumpkins are improved. The yield of the hybrid seeds of the rootstock-used pumpkins is improved by 25.4%-28.7%, and the thousand seed weight is increased by 11.2-11.4 g.