Abstract:The Pretax Additional Deduction(PAD) policy is the most effective instrument to an enterprise for increasing its R D investment and improving the capability of independent innovation. With the questionnaires from 330 local companies in Jiangsu Province, we conclude that firm size, nature of business, R D level of corporate , the level of corporate financial management, intellectual property protection strategy of corporate, the regional administrative policies, the level of policy service , reporting costs, administrative efficiency, the government"s financial policies to support independent innovation of enterprises have impacts on the effect of PDA policy implementation. Among them, R D level of corporate is the most significant positive factor; the level of corporate financial management and intellectual property protection strategy are more important positive and negative factors; firm size , nature of business ,the regional administrative policies and administrative efficiency are important positive factors; government financial support policy is a negative fact, but there are no concerted efforts between the various policies; The level of policy service is a positive factor and reporting costs is a negative factor. Accordingly, this paper proposes suggestions.