Abstract: Based the modified production function，the share of the Gansu capital，labor and technological progress contribution to economic output is estimated. The results show that the capital investment contributed greatly to economic output，technological progress is unsatisfactory effect on economic output，while the contribution of labor to output a lower level. Therefore，economic development depends mainly on capital driven by high input and economic development is still in the extensive stage，which is unsustainable development. To development sustainably，the elements of conversion efficiency must be improved，and the quality of workers and skills be increased.

Key words: technological progress, economic growth, modified C-D production function

摘要： 利用修正的生产函数较好地估计了甘肃省资本、劳动和技术进步对经济产出的贡献份额。结果显示，资本投入对经济产出贡献较大，技术进步对经济产出效果不理想，而劳动对产出贡献处于较低水平，经济发展主要依靠资本高投入带动，经济发展还处于粗放式阶段，这种模式是不可持续的。为了可持续发展，必须提高要素转化效率，提高劳动者素质和职业技能。

关键词: 技术进步, 经济增长, 修正的C-D函数