PBL goes with the trend of the times which is conducive to cultivate students' comprehensive qualities and autonomous learning ability, moreover, to stimulate their creativity, exploration and critical thinking so as to provide the society with interdisciplinary talents. This paper aims to probe into the validity of PBL method in College English reading teaching through the review of PBL theory, the contrast between traditional class and PBL class, and the PBL class design of College English reading so as to lay the foundation for further in-depth teaching and research in the future.