Abstract: Actually S&T Contribution Rate is the contribution rate of productivity growth(or generalized technology progress) to economic growth. This thesis analyses the new classical economic growth model on calculating S&T contribution rate. It studies the new way of calculating productivity growth by introducing intangible capital, which has been studied by the special research project of "European competitive, innovation, and intangible investment ". It also analyses the limitations of appling this way to calculating S&T contribution rate in China and proposes some policy suggestions.