Abstract: Fresh cones of 20 half-sib families of Cunninghamia Lanceolata were collected from Second Generation Clonal Seed Orchard in Ganzhou, Jiangxi province in October 2018.Determinations were implemented on their fresh cone weight, seed weight, seed yield, thousand seed weight and seed soundness.The results showed that there were significant differences in seed fresh cone weight, seed weight, thousand seed weight and seed soundness among 20 half-sib families.The family of No.73 had the best seed quality, with the largest fresh cone weight and seed weight of 0.406 7 kg and 16.233 5 g, while its thousand seed weight, seed soundness and seed yield had 8.136 0 g, 44% and 3.99%, and the thousand seed weight and seed soundness was significantly higher than most families.Followed were families such as No.29, No.31 and No.35.The experiment demonstrated that it had no single positive correlation between seed yield with fresh cone weight, seed weight, thousand seed weight and seed soundness.There was no correlation between seed quality and the dispersion degree of seed quality index.