Common buckwheat is a cross-pollination crop. The germplasm resources of the common buckwheat is in a biological mixing state in nature and each of common buckwheat could be divided into several new genetic germplasm resources. This problem could reduce the effectiveness of breeding and scientific evaluation of the germplasm resources. Simplifying the genetic background of the common buckwheat germplasm resources, and accurately describing the parent offspring relationship and genetic background are difficult technical issues facing the buckwheat germplasm researchers around the world. Breeding of germplasm resources requires quarantine measures in the trial fields, which needs to consider the size of pollen, mechanisms of buckwheat pollination, species of visiting insects, and amounts of seeds to produce etc. Here in this study, we developed a new method called “Five Nurseries” which includes quarantined hybrid nursery, quarantined individual breeding nursery, quarantined propagation nursery, quarantined control nursery, and field trial nursery. The purpose of this study is to explore the new buckwheat germplasm resources. The results of this study will allow us select the best generation lines for crossing and provide the best germplasm resources of new buckwheat varieties.