Teachers' blended teaching ability refers to the ability of teachers to use both online and offline occasions and scenes for blended teaching. At present, the blended teaching ability of teachers in China University of Geosciences (Beijing) is still insufficient, which affects the effectiveness and quality of blended teaching. This paper puts forward the improvement mode of informatization teaching ability under “double blended learning-driven”, that is, to transfer to the "blended" teacher teaching through the "blended" teacher training. Starting from the inscapes and existing problems of teachers' blended teaching ability in universities and colleges, this paper creates a flexible training mode of teachers' blended teaching ability in universities and colleges, taking the major of Business Administration as an example, giving an effective way to improve teachers' informatization teaching ability, so as to provide reference for the university to design and optimize the mode of teacher training.