Combined with the “Internet + Education” technology, an information-based teaching resource platform, named interactive virtual experiment platform including web program and Wechat applet, is developed independently for mechanics theory courses. This platform solves the problems such as the reduction of experimental class hours in theoretical mechanics, vibration mechanics and other mechanics theory courses, as well as the difficulty for students to combine theories with phenomena and explore mechanical phenomena independently. Based on this interactive virtual experiment platform, the exploratory and progressive teaching modes with student deep participation are proposed to promote the cultivation of students’ scientific thinking and ability. The practice shows that the interactive virtual experiment platform effectively promotes the students’ understanding and applications of theories, expands the breadth and depth of theoretical teaching, promotes the students’ participation and teacher-student interaction in class, and improves the learning effect and quality of theoretical course teaching as well.