This paper uses Edgar Dale's Audio-visual Learning Theory and Jean Piaget's Constructionist Learning Theory as the theoretical framework to conduct two control experimental tests and a questionnaire research to investigate students' impression and expectations toward WeChat public account based mobile learning mode as well as its validity, advantages and shortcomings. The findings of the research are as follows: (1) students who use the WeChat public account based mobile learning mode can perform better in acquiring knowledge and passing examinations than non-users; (2) students' mobile learning habits find a good basis for their acceptance of the new WeChat learning mode; (3) most students respond to the new WeChat learning mode with a positive attitude, and universities can introduce this mode into the course design; (4) this new WeChat learning mode helps students learn literature in the aspects of interest stimulation, ability improvement and literature content learning; (5) WeChat mobile learning is only an extension of the current form of learning and cannot replace the current traditional school education; (6) Mobile learning mode based WeChat public account is an important teaching aid for teachers in the aspects of information dissemination, interactive mode and updated contents; (7) The experience of improving the current mobile learning model of WeChat public account can be enriched from students' feedback. It is hoped that WeChat mobile learning will efficiently activate students' learning potentials and promote English and American literature teaching innovation.