Abstract: China is a mega-diversity country and one of the origin centers of crops in the World. Due to the large land area, big different climates, very complicated landscapes, a lot of soil types and long history of agriculture, China is rich of crops and their wild relatives. This paper introduced the wild relatives of different crops based on the crop classification. The basic information would provide technical support for further research development of the resources and policy making for the government on conservation of wild relatives of crops.