Business English in China has evolved into a cross-disciplinary program from ESP, with more than 1000 universities having set the program of business English in bachelor, master or doctor degree levels. In general, it has undergone a rapid development and enjoyed a more and more social recognition. This paper tries to uncover the underlying motives of the quick development of the program based on the perspective of human capital theory, and find out the possible relationship between business English teaching development and human capital The results conclude that there exists the relationship between them, and the theory of human capital opens a novel theoretical foundation for the related researches.