本本文以促进自主创新的知识产权政策体系为研究对象，通过MATLAB语言进行编程并运用BP神经网络进行数学建模，探究其对我国社会福利的影响，旨在找出当前政策体系的不足，为提升我国的社会福利提供政策建议。研究表明：不同政策指标对于社会福利的影响方向和影响力度呈现出较大差异。本文认为，政府应该在增加政策数量的同时，加强政策力度；调整政策目标，协调政策冲突；完善政策配套措施，淡化行政干预。

Taking intellectual property right policies system of promoting the capability of indigenous innovation as a subject, establishing mathematical model of BP Netual Net through MATLAB, the paper explores its effects on social welfare in China, so as to give some advices on how to promote social welfare in China. The author discovers that different policies have diverse influence on the direction and degree of social welfare. The paper concludes that the government should not only add up the number of the policies, but also strengthen the effort of the policies， should adjust the policy goals, promote the conflict coordination mechanism between policies, reform the measures of the policy system, and desalinate administrative intervention and utilizing policy tools of stimulating innovation.