Since 2006, the system of China′s science and technology Innovation Policy has been changed profoundly with the intense promulgation of the policies to spur science and technology innovation，among which，the national-level plans, strategies，programs and measures, such as the National Medium and Long-Term Science and Technology Development Plan (2006-2020), the Outline of the National Strategy of Innovation-driven Development，the measures to vigorously promote mass entrepreneurship and innovation, are of great importance. However so far there have been few very recent attempts at comprehensive research in understanding China′s science and technology innovation policies (2006~2018). This study will fill the gap by quantitatively analyzing the evolution of China′s science and technology innovation policies issued from 2006 to 2018 and examining the nexus between the aforementioned policies and China′s innovation performance.In this study, the main valid science and technology innovation policies issued by the central state ministries and commissions are collected and then analyzed on the basis of previous research to evaluate the strength, enforcement and synergy of these policies quantitatively. The evolvements of the synergy and the total efficacy of these policies are dissected and depicted since 2006. The production function model is established and then the ridge regression is applied to examine the relationship between the traits of science and technology innovation policies, from which the following conclusions can be inferred. As a first consequence, the synergy of China′s science and technology innovation policies from 2006 to 2018 is rising significantly with the improvement of the policy-making cooperation among the ministries and commissions under the State Council and the growth of the policies issued by two or more departments. Currently the cooperation of the policymakers regarding the science and technology innovation policies is associated closely with the Ministry of Science and Technology, the Ministry of Finance, the National Development and Reform Commission, the Ministry of Education and the Ministry of Industry and Information Technology. It is a common consensus in China that the national ministries and commissions should take coordinated policy action to promote the science and technology innovation.The second conclusion is that the efficacy of China′s science and technology innovation policies is growing markedly since 2006 along with the increase of the strength of the innovation policies, the comprehensive application of various policy instruments, the policy making cooperation among national departments and the improvement of the policies′ implementation efforts. The efficacy of these policies is underlined by the recent performance of the science and technology innovation in China. Finally, it is confirmed empirically by ridge regression that the science and technology innovation policies have significantly positive effects on the science and technology innovation performance. Meanwhile, differences are observed among various traits of the science and technology innovation policies in their influences on the outcome of innovation. Due to a very great portion of applied research, the major science and technology achievements are most closely affected by the enforceability of the science and technology innovation policy. More major achievements can be produced with a clear and specific orientation stated in the science and technology innovation policies. The enhancement of the synergy of science and technology innovation policy can be conductive to the growth of the invention patent grants, therefore to obtain more independent intellectual property, the policymakers should cooperate more to improve the synergy of the science and technology innovation policy. The sales revenues of new products are mainly influenced by the strength，enforcement and synergy of the science and technology innovation policy so that it is necessary to integrate the three aspects, that is, efficacy, synergy and clarity of the policy, to promote the sales growth of new products.