The invention provides a virtualization method and device for a distributed device and is applied to the distributed device. The method comprises the steps of obtaining virtualization configuration data which is configured by a user through a virtualization system and corresponds to a target board card, wherein the virtualization configuration data is a plurality of nve interfaces or a plurality of VXLAN IDs for virtualizing the target board card; judging whether a type of the target board card match the type of the virtualization configuration data or not; if the type of the target board card does not match the type of the virtualization configuration data, carrying out type conversion on the virtualization configuration data based on a pre-configured mapping relationship between the nve interfaces and the VXLAN IDs; and establishing a virtual device corresponding to the target board card based on the virtualization configuration data after the type conversion. Through adoption of the technical method provided by the invention, a manager can carry out virtualization management configuration on the distributed device conveniently.