Field experiment was conducted to study effects of different ridge and mulching cultivation, nitrogen and potassium fertilizers combined application on soil temperature, growth period, agronomic characteristics and yield of potato. The results showed that ridge and mulching cultivation raised the soil temperature. Soil temperature under white plastic mulching and 25 cm ridge increased faster than black film, and potato emergence earlier. The market-able tuber percentage and yield of potato were the highest when the height of white film ridge was 25 cm. Optimization of ratio of nitrogen and potassium fertilizer operation can effectively improve the agronomic characteristics and yield. Right amount increase of potassium application was beneficial to the marketable potato tuber percentage and yield at the base of enough nitrogen fertilizer application. The best conditions obtained from the preliminary tests for agronomic characters and their yield and quality of potatoes were nitrogen fertilizer at 13 kg/667 m² and potassium at 37.5 kg/667 m².