With the continuous development and application of the Internet, the traditional physical education teaching content of ordinary colleges and universities has become more and more serious, and it has not satisfied the students 'needs. Therefore, this paper put forward a research on the MOOC mode of P.E. teaching in the background of "Internet +" based on fuzzy decision tree algorithm, constructed the model of PE MOOC teaching, and introduced the fuzzy decision tree algorithm to optimize it. The results of teaching experiments show that the MOOC mode of physical education in colleges and univer...