Multipopulation migration of salmonoid is very rare in China, one isfound in Suifen river. The multipopulation was made up by more than 1,000 indivi-duals of pink salmon (O. gorbusha). cherry salmon (O. mason) and chum salmon.The rate of each species was 33.4%, 12. 2% and 65.4% for pink, cherry and chumsalmon respectively in 1986. Their population structures were as follows: The ave-rage body length of pink salmon was 44.6 (35.0-60.0)cm and its average bodyweight was 1,145 (550-3250)g. They were all 2-year old individuals. Their avera-ge fecundity was 1,231 eggs. They migrated up stream in June to August andspawned in August to September. The average body length of eherry salmon was55.7 (49.0-70.0) cm and the average body weight was 2,595 (1,800-4,000)g.Population was made up by 2-3 years old individuals, in which 3 years old indivi-duals occupied 93.5%. The average fecundity was 3,232 eggs and migrated in Mayto August, spawned in August to September. The average body length of chumsalmon was 71.2 (34.0-82.0) cm and body weight was 4,150 (1,700-7,500)g.The population was formed by 2-4 years old individuals, in which 3-year indivi-duals was about 66.4%. The average fecundity was 4,260 eggs and the migratingand spawning seasons were the same in September to October. In exploitation andincrement of the resources of these valuable salmonoids, a large scale artificialreleasing of parr or smalt should be adopted.