Technology-based SMEs are new forces of innovation. Since the implementation of the policy of R&D expenses additional deduction for technology-based SMEs, it has played a positive role in promoting the innovation and development of technology-based SMEs and enhancing their competitiveness. However, over the past year, there have been many problems in practice, such as high threshold of enjoyment, declining policy gold content, imperfect operation of evaluation mechanism. In order to further promote the policy to achieve better incentive effect, this paper puts forward optimization suggestions in policy design, management mechanism, follow-up supervision and other aspects.