Science and technology are primary productive forces，it’s no doubt about the role of S&T progress in the development of the economy. However，estimation of the contribution portion of S&T progress in economic growth has always been controversial both in theory and practice. In this paper，the estimation methods of the contribution portion of S&T progress in economic growth is expounded in theory by using the C-D production function and Solow residual value method. In the empirical，scientific and technological contribution portion in the economic growth since 1990 was estimated based on the economic data of Beijing between 1990 and 2013 and data processing by SPSS statistical software. Finally the scope and limitation of contribution rate of scientific and technological progress are explained.