Abstract: In order to know seeds germination and growth of seedling of different provenances and families, the author analyzed and compared thousand seed weight and germination rate on 16 Alnus species, including 21 provenances and 10 families. The results showed that: thousand seed weight and germination rate of Alnus had much variation among different materials and the average thousand seed weight was 0.90 g and most of them ranged from 0.50 g to 1.5 g. The average germination rate was 9.69% in different species and 20.40% in different families, and the germination energy were 5.4% and 18.92% respectively. Correlation analysis did not have significance. The Alnus glutinosa with 32.12 cm height and 7.03 mm diameters of ground stem was the biggest among of them, and it had a certain potentiality to use in practice.