The comparative tests of forestation were made. The different grade seedlings, which were from 8 Chinese fir families of the second generation seed orchard were selected as the samples. Within 16 years, which was the rotation age for small dimension wood cultivation, the growth rate were analyzed when tree was 15 years, 8 years and 16 years old. The results showed that there were significant differences among height, DBH and stem volume of different grade seedlings before the age were 4year. And those were not significant after age at 5. There were not significant differences among annual increment of height among different grade seedlings before the age was 4year, but it was affirmative among families. Interaction of grade and family was not significant. There were some differences among rate of survival and there was intimate correlativity on growth between parent and filial generation. By using of superior families or strains, 40% volume gain would be achieved. The early growth of families or individuals was affected significantly by seedling quality. Therefore, we proposed that families or individuals selection should be performed after age of 5.