Abstract:    Green technology innovation serves as the core driving force in synergistically advancing green development and the innovation-driven strategy. As a new form of circular industrial organization, there are few studies on how industrial symbiotic agglomeration affects green technology innovation. In this paper, the influence mechanism of industrial symbiotic agglomeration on green technology innovation was revealed for the first time, and its effect was tested based on the staggered DID method. The results showed that industrial symbiotic agglomeration significantly promotes green technology innovation. The mechanism test revealed that industrial symbiotic agglomeration mainly promotes green technology innovation by promoting green knowledge spillover and gathering innovation elements, and the role of environmental regulation has not yet emerged. Additionally, industrial symbiotic agglomeration also promotes green technology innovation in neighboring cities, and its spillover effect is significant within 200 km. The green technology innovation effect of symbiotic agglomeration can be significantly exerted only when the scale of symbiotic agglomeration reaches 187.17 km², and the effect amplifies with an increasing number of parks. In the areas where the government pays more attention to environmental protection, the green innovation effect of industrial symbiotic agglomeration is more pronounced. Furthermore, industrial symbiotic agglomeration has a significant effect on enhancing the quality and increasing the quantity of green technology innovation. Therefore, the government should strengthen policy support and guidance, and further gather green innovation elements. Furthermore, green technology standards and green factory certification system should be established to promote green technology innovation and improve quality. Government′s attention should be paid more to environmental protection to exert further the forced role of environmental regulation on green technology innovation. This study will be helpful to provide some theoretical supports and practical references for implementing new development concepts, promoting industrial green development and improving national green innovation capability.

Key words: industrial symbiotic agglomeration, green technology innovation, enhancing quality and increasing quantity, staggered DID