Abstract: Through testing more than 20 pieces of rape in Jiangsu Province, demonstration pilot project, the analysis of more than 1100 sets of systematic materials accumulated in time is put in order in more than ten years, have studied the output and relation of structure between one layer of four-dimensional space-time of angle fruit under colony's state of the rape. Define horn fruit layers of thickness and horn fruit layers of density rape important colony quality index, it is the comprehensive economic indicator too. Horn fruit layers of thickness catch position, main shaft and one length two influence of factor of branch first effective branch mainly, horn fruit layers of density receive colony main shaft and one - two branch count, branch grow neat degree and branch upper horn fruit born density 3 pieces of influence mainly. Propose fertile colony corner fruit layers of thickness and horn fruit layers of quality index of density; Have proposed the basic principle of the optimization colony's quality of ultra fertile culture: The solar energy before fully utilizing winter, increase material input properly; Key measure: Right one sows imposing early, reduce the density properly, increase the fertilizer in right amount.