Abstract: In order to optimize the cultivation of the new,high yield hybrid rapeseed Fengyou 701(Brassica napus L.),an experiment was conducted.A mathematical model was established for the relationship between various cultivation measures and the crop yield by means of the quadric universal rotation design.The optimal agronomic conditions for a yield greater than 2 800 kghm-2 included: pure N at 277.44-288.67 kghm-2,K2O at 187.62-226.41 kghm-2,planting density at(11.80-12.61)?104 plantshm-2 and seedling transplant at 34.5-37.5 day old.