Based on the characteristics of Probability Theory course and the disadvantages of traditional classroom teaching, this paper puts forward suggestions of blended teaching in the context of "Internet+ education". The overall design of blended teaching mode of this course is based on the network teaching platform, which integrates the information technology into the traditional teaching organically, which fully arouses the students' enthusiasm and initiatives of learning. It has effectively helped to improve the teaching efficiency and quality and cultivated the students' self- learning ability.