Abstract: In the management of modern enterprises,innovation is the source of keeping vitality.The performance of technological innovation determines the level of enterprises innovation achievements, is one of the important indicators to measure the innovation ability of enterprises. In recent years, it has become a hot topic of management research. Scholars are committed to finding out the internal and external factors of enterprises and exploring their influence mechanism, in order to improve the technological innovation ability of enterprises, and enhance independent innovation,realize the healthy and rapid development of enterprises. Among the many factors that influence the performance of technological innovation, the investment in R&D is the first fundamental one,as well as the important guarantee. In the research of enterprise management behavior, the research on Cost Stickiness is an important way to reveal the "management black box" of enterprises. The existing research on Cost Stickiness can be divided into "Favorable Theory" and "Unfavorable Theory", both of which reflect the importance of Cost Stickiness in enterprises. On that basis, this study focuses on the R&D investment and want to explore the impact of the existence of R&D Cost Stickiness on the firm's technological innovation performance.Therefore on the basis of a large number of literature research redefined the Stickiness of R&D Cost, namely the relationship between enterprise innovation input and business volume change is not strictly matched, and has established the relationship between the Stickiness of R&D Cost and performance of technological innovation.In this process,also further analyzed the enterprise scale and the intermediary effect of financing constraints. This paper specifically studies the Stickiness of R&D Cost,choose the data of listed industrial enterprises in China from 2015 to 2019 as samples, uses the model of WEISS to measure the Stickiness of R&D Cost in enterprises, and set up the relationship model of R&D Cost Stickiness and technology innovation performance, conducts multiple regression analysis,multiple regression analysis is carried out to empirically test the influence of R&D Cost Stickiness on technological innovation performance, and analyze the performance of this influence under different property rights.The results are as follows:As the general Cost Stickiness, the Stickiness of R&D Cost is common in listed firms, is a common phenomenon existing in the listed companies in China.Different enterprises have different R&D Cost Stickiness, and it has a significant positive effect on the performance of technological innovation of enterprises, which is helpful to improve the performance of technological innovation. In the further empirical analysis found that corporate R&D Cost Stickiness of positive influence on the technological innovation performance of mechanism was more marked in non-state-owned enterprises.At the same time, under the influence of enterprise scale effect and financing constraint conditions, the promote significant effect of R&D Cost Stickiness to the technological innovation performance exists but still relatively weak.Further analysis shows that although there is a positive correlation between firm size and technological innovation performance, but the promotion effect of R&D Cost Stickiness on technological innovation performance weakens under the effect of scale effect. Secondly, financing constraints have a restrictive effect on R&D Cost Stickiness to a certain extent, then affect the promoting effect of R&D Cost Stickiness on technological innovation performance. Finally, putting forward some proposals according to the results of the study, the existence of R&D Cost Stickiness is positive, helps to improve the performance of enterprise technology innovation.So, in order to improve enterprise's technology innovation performance and capacity for independent innovation,enterprise should encourage attach importance to research and development, reasonable increase R&D investment,at the same time, pay attention to strength the relevant aspects of improving innovation performance.