The embodiment of the invention provides a virtual network mapping method and device based on bottom node sorting, which are applied to a controller. The method comprises the steps of receiving a target virtual network request; obtaining an attribute value of each piece of attribute information of each bottom node in a current bottom network; according to the attribute value of the each piece of the attribute information of the each bottom node and a weight parameter that is computed in advance and is corresponding to the each piece of the attribute information, computing a sorting weight corresponding to the each bottom node; according to the sorting weights, performing sorting on the each bottom node to form a first queue; and according to the first queue, a computation resource requirement of each virtual node and a bandwidth resource requirement of each virtual link, performing mapping on the each virtual node and performing the mapping on the each virtual link. The virtual network mapping method and device provided by the embodiment of the invention can better adapt to a changing network system, and the effect of mapping a virtual network is improved.