Aiming at the single teaching method of the course of C Language Programming in traditional teaching and easily causing two-level differentiation of students' learning effect, the 1 + e teaching mode combining offline one classroom teaching with on- line e-network teaching is built. This paper takes students from different classes of the computer major of our school as the research object, and compares the traditional teaching model and the 1 + e teaching model based on academic performance and program- ming ability. Practice shows that the 1 + e fusion teaching mode is more suitable for the modern teaching of the C language pro- gramming course, and the teaching effect is good.