Comparative advantages of potato and major crops of Jilin province in the country were calculated using the theory of comparative advantage and analysis method of benefit calculation.The results showed that potatoes,soybeans,sorghum and maize in Jilin province have advantages in production efficiency.Sorghum,maize and soybean have advantage in production area.Analysis of benefit showed that rice,maize and potato production occupied at the top three in Jilin province.Maize,sited at its unique advantage of the Golden Corn Belt and the largest area in Jilin province,is the largest plantation crop.Rice,potatoes and soybeans,for its high economic benefit,their production are large-scale and they are also important parts in the planting structure in Jilin Province.