Abstract: Pot experiment of wheat and fababean in intercropping was conducted in Yunnan agricultural university to study the effect of different level of N and K nutrition levels on the N and K uptake and the incidence of Blumeria graminis(DC).Speer in intercropping pattern.The results showed that the grain yield of wheat increased by 74.7%133.9% due to the intercropping,The amount of N uptake by wheat increased by 32%69% and the K uptake increased by 32%69% at low nitrogen supply level in intercropping.The amount of K uptake increased by 25.5%57.3% after supply potassium fertilizer.The intercropping advantages became smaller at high nitrogen supply level.The occurrence of Blumeria graminis(DC).Speer of wheat decreased by 42.1%83.1% in wheat and faba bean intercropping,and the occurrence of Blumeria graminis(DC) correlated with N concentration of wheat's stem and leaf with the coefficient being 0.623*0.702**.