Human capital is the basic power and the key factors of economic development. The country's economic development mainly depends on the accumulation of human capital. As the basic way of human capital investment, education is considered to be the most direct the most effective means. For education directly promotes the development and the increase of human knowledge and skills. From the evolution of the modern human capital theory, this article summarizes the connotation of human capital and expounds the promoting effect of human capital on economic growth. The article demonstrates that the education is the core elements to improve human capital because education can make possible labor turn into the reality of the basic way of labor. Education is an important way to make the productivity of knowledge form into direct productive forces. Besides education is a significant factor to improve labor productivity. At last, based on the current situation of the lack of human capital investment in our country, the article puts forward measures and enlightenments.