The failure of the SCI-TECH financial market mechanism makes it difficult for SCI-TECH SMEs to raise sufficient funds for development. Therefore, it is necessary for the government to construct government promotion system of SCI-TECH finance, give full play to the functions of fund support, investment guidance and environmental optimization, so as to make up for the market failure, combine government promotion mechanism with market mechanism, and jointly solve the financing difficulties of SCI-TECH SMEs.