With the approaching of the age of big data, education is going through a brandnew reform, and college English teaching will no longer take the traditional onefold and coincident mode. Teaching aims, teaching objects, teaching resources, teaching contents, teaching forms, teaching methods, and teaching assessments embod complicated and pluralistic characteristics. Beginning with the introduction of great impact of big data on college English teaching, this papers analyzes the challenges and puts forward ideas for college English teachers career development in the age of big data. College English teachers are confronted with big challenges in the aspects of integration of big data knowledge, conversion of teacher’s function and role, change of students, teaching planning and evaluation. In order to be adapted to such development of college English teaching and to achieve good career development, college English teachers must be prepared in advance in education philosophy, English practice skill, English education technology, English discipline application. They should enhance the ability to integrate big data to meet the need of individualized teaching, amend classroom teaching modes and methods to improve students’ English application ability, prepare in advance for the transformation of college English course, and get involved in trainings to improve teaching and research capabilities.