Objective In the process of implementing the goal of carbon peaking and carbon neutrality, strategic new energy is becoming the key path of energy structure transformation. Green finance guides capital flow to green industries through innovative financial instruments. This paper studies the mechanism of strategic new energy and Green Finance on energy economic efficiency, which has important practical significance for establishing and improving the green financial system, supporting the development of strategic new energy and improving energy economic efficiency.

Method We constructed a dynamic spatial panel data model to study the spatial and temporal dual change law of energy economic efficiency by introducing variables that can characterize the combination of multi category energy technologies and the comprehensive efficiency of multi category green finance, and the synergy mechanism of strategic new energy and Green Finance on energy economic efficiency was analyzed.

Result The results indicate that strategic new energy, green finance and other factors not only directly promoted the improvement of local energy economic efficiency, but also had a positive spatial spillover effect; The relationship between energy economic efficiency and industrial structure presents an inverted U-shaped curve. The proportion of added value of high-processing industry and high-tech industry increases, which gradually improves the energy economic efficiency of large-scale industries; The technological innovation, development scale and market share of strategic new energy have become the key elements to improve energy economic efficiency, forming an effective positive cycle of "technological breakthrough-scale expansion-market leading", and orderly promoting the improvement of energy economic efficiency; Green financial instruments such as green credit, green bonds, green funds and green insurance have a significant positive effect on energy economic efficiency. They can improve energy economic efficiency through systematic measures such as reducing financing costs, guiding the direction of technological innovation, providing capital liquidity and dispersing investor risks.

Conclusion Based on the resource endowment of Guangdong Province, this paper gives policy suggestions on strategic new energy development, green finance and its collaborative improvement of energy economic efficiency.