Abstract: The 32yearsold Pinus sylvestris var. mongolica openpollinated progeny testing forest were sampled as the research object, which set on the Longjiang Cuohai Experimental Station in Heilongjiang province, to analyze the family genetic variation of growth traits, carbon content and stem carbon storage, and estimate their genetic gain, then filter the superior families of high carbon storage and carbon density. The results showed that there were plentiful genetic variation in trunk volume, biomass and carbon storage and the variation coefficient was 31421%, 31998% and 31903%, respectively. The genetic variations in wood basic density, carbon content was relatively small, and the variation coefficient was 2725% and 1868%. There was weak negative correlation between carbon content with the other traits. Trunk carbon storage was significantly positive correlated with tree height, diameter at breast height (DBH) volume and trunk biomass. Synthesize the above results, K70 and A64 had been chosen as the superior families. The mean value of carbon storage was 19903 kg, which was higher than mean value of all families by 3689%.