The effects of nitrogen and phosphorus application on cluster redpepper have been studied though a test.Regression equations of the yield,pepper number per single plant,single pepper weight,quantity of N,Ca,Mg nutrient uptake to quantity of N and P-2O-5 application were established.Use the equation of the yield,estimated highest and most economic yields.Corresponding the quantity of N and P-2O-5 application were estimated too.Use partial regression curves of its to quantity of N or P-2O-5 application.Explain effect of quantity of N and P-2O-5 application to the Plant.