Abstract:     Since the international financial crisis in 2008, the world economy has entered the period of profound adjustment. Industries are fiercely competitive among countries around the world and the developed countries have put forward the strategy of "industrialization", trying to promote the manufacture level of industrial technology innovation and the development of emerging industries and continue to control firmly technology innovation and professional services industry value chain link through adjustment of industrial structure in the new platform. As the largest developing country in the world, China has achieved the transformation from a weak country to an economic power. In the process of this transformation, structural contradictions in China′s industrial layout have become increasingly prominent. Industries with high energy consumption, high pollution and low efficiency still account for a large proportion in China′s industrial system. It works in the short term but it is an unsustainable development model in the long term. Its malpractice already began to show in China, and there are many reasons for this kind of unreasonable industrial structure. Therefore, it is urgent to adjust the industrial structure, change the mode of economic growth, improve the capacity of independent innovation and build China into an innovation-oriented country.
    The 18th National Congress of the Communist Party of China pointed out that the strategic adjustment of industrial structure fosters new economic growth points, and improves the independent innovation ability of innovative countries. With China′s economic growth into the new normal, the implementation of national innovation-driven development strategy, the high-quality economic development, and industrial structure adjustment and innovation have become important drivers of high-quality economic development, and the adjustment of China′s industrial structure in the coming period is a more difficult task. In this context, industrial structure adjustment is not only the support force of sustainable development of the national economy, but also an important way to enhance the transformation of independent innovation, enabling China to grow from an innovative power to an innovative power. As China′s economic growth has entered a new normal and the country′s innovation-driven development has been put forward, the task of adjusting the industrial structure has become more arduous. Based on this background, this paper adopts the data of industrial enterprises above the scale from 1998 to 2017 to construct the structural adjustment range and quality index of industrial enterprises respectively. From the perspective of industrial structure adjustment range and quality of industrial structure adjustment, it examines whether industrial structure adjustment promotes the improvement of regional innovation performance.
    The results show that: (1) The adjustment of industrial structure has a significant effect on regional innovation performance, and it is found that the adjustment range and quality of industrial structure have heterogeneity on inter-regional innovation performance. (2) Significant spatial spillover effect exists in the adjustment of industrial structure. This spillover effect exists in the whole country and has an inhibitory effect on regional innovation performance. It is found that there are regional differences in spatial spillovers. The quality of industrial structure adjustment in the eastern and central regions has a restraining effect on the spatial spillover effect of innovation performance, while the industrial structure adjustment in the western regions has a promoting effect on the spatial spillover effect of innovation performance. (3) Industrial structure adjustment has threshold effect on regional innovation performance. The adjustment range of industrial structure has a single threshold on the regional innovation performance, and the quality of industrial structure adjustment has a double threshold effect on the regional innovation performance. Only when the two have crossed the threshold value can their positive effects on the innovation performance be transformed into the driving force of innovation. 
    Based on the above conclusions, this paper has the following policy implications: (1) Due to regional resource endowments and regional economic development level differences, different regions in the process of industrial structure adjustment should take advantage of the present industrial development in this region and its regional resources, adjust and optimize continuously the industrial transfer in the process of resource redistribution, so as to realize the coordinative development of industrial structure adjustment and innovation performance. (2) As the market mechanism cannot compensate and correct the economic externalities, the government needs to use "visible hand" to solve the market failure and establish a strong policy mechanism to promote innovation performance in the process of macro-industrial structure regulation and control policies. (3) In the adjustment process of industrial structure in different regions, the adjustment should be carefully treated, so as to avoid distortion of the allocation of production factors in space and between industries, and prevent the overcorrection from inhibiting the improvement of regional innovation performance.

Key words: industrial structure adjustment, innovation performance, threshold effect, space panel