Abstract:New mountain king is a new strain selected and bred out through seedling and dome selection from one Japanese Castanea mollissima . It has advantages of upper quality, early bearing, high-yield and stable yield and strong stress tolerance and plump, regular and large-grain nut with average grain weight of 21.9 g. Now it has been through primary recognition by specialist and is tried to plant in counties and cities of Hubei province such as Zhongxiang, Luotian, Yingshan, Dawu, Jiangxia and Jingshan etc.