Along with the transformation and upgrade of the domestic industry,more and more attention is being paid to the firm innovation performance.Organizing and summarizing the existing research conclusions about the influences of technology import and independent research and development on the firm innovation performance,based on the system dynamics method,the factors which affect the performance of enterprise innovation were classified.Then the software of Vensim was used to perform the model validation test,and a feedback loop was provided to connect the key variables and other variables.The effect of the proportion of technology import spending to independent research and development spending on the firm innovation performance was analyzed.It is shown that the independent research and development and technical introduction can promote the firm innovation performance;increasing the spending with the same proportion,the independent research and development can promote the firm innovation performance more effectively.