Abstract: Based on the measurement of all individuals of population at different successional stage,the investigation on edge dispersal effect and the following excavation of clones,the dynamics of age structure and genetic consequences of Hippophea rhamnoides L.subsp sinensis clone population in Mu Su sandland were examined. The results showed that the age structure of the clone population was characterized by a transformation from an increasing type in the early period starting from the initial colonization through a stable type to a declining type. The clone population could maintain or recover its stability by edge dispersal and gap regeneration with clonal growth. As the population self thinned, the composition of clone population changed from more clones with less ramets to less clones with more ramets and the genetic diversity of clone population decreased.