Wild F.cymosum is the most widely distributed wild buckwheat resources, which have high genetic diversity. The environmental changes and human action give rise to the loss of wild F.cymosum resources, therefore, it is urgent to protect F.cymosum wild resources. In this study, based on the collected wild F.cymosum resources, we compared the differences between sexual reproduction and asexual reproduction on the off-site reproduction of F. cymosum and discussed the effects of tuber propagation on the off-site propagation of wild buckwheat in different geographical environments . The results showed that the tuber reproduction of F.cymosum was relatively better, and it was conducive to its outcrossing and fruiting after a large population was formed by off-site reproduction. The difference between the altitude of habitat, climate conditions and breeding sites has an impact on the germination, growth and reproduction of wild F. cymosum ,the geographical conditions of Zhaojue County were suitable for the off-site reproduction of F.cymosum ,the research results have certain reference value for the formulation of ex situ propagation and conservation strategies of F.cymosum.