During the process of exploring the sustainable eco nomic development path, all countries in the world have realized the significant role of technological innovation. I n recent years, the dominant position of small and medium-sized enterprises (SMEs) in the technological innovation has been universally recognized, and many countries have launched corresponding supportive policies to promo te the improvement of innovation capability in SMEs . This dissertation comparatively analyzes the public poli cy systems for promoting technological innovation i n developed countries and developing countries, and points out the deficiencies of current Chinese policies for te chnological innovation. Specifically, they are mainly reflected in three perspectives: lack of legal protection, i nsufficient support in fiscal taxation policies and incompleteness of s ocial service systems. Therefore, according to the problems in the collaborative innovation of technological innovatio n in SMEs and public policy innovation in China, th is dissertation puts forward five suggestions to const ruct the corresponding supportive policy system so as to provide possibility for the further integration of regional collaborative innovation