Abstract: Dumping yards generated in hydropower station construction in dry-hot river valley of Jinsha River are the most difficult places to restore,a study on the soil seed bank of different dumping yards generated in Jinanqiao hydropower station construction was carried out based on seed germination trial.The results showed that the seed densities in the soil seed banks of dumping yard platforms were between 92 and 633 seeds穖-2 in the top soil of 10 cm,the seed densities in the soil seed banks of dumping yard side-slopes were between 25 and 325 seeds穖-2.The total of the seed bank of different types dumping yards belongs to 12 families,20 genera and 20 species,Cruciferae and Compositae were dominant families,herb seeds were dominant on the aspect of seed densities,but the densities of trees and shrubs were very low,Capsella bursapastoris was dominant species.The seed densities of the main open-digging were higher than those of the main hole-digging,and the seed densities descended as time past,efficient measures should be taken to restore the dumping yards as soon as possible.