Originning from professional and syllabus of the food machinery and equipment curriculum, for the purpose of improving the students' knowledge and understanding of the mechanical structure and the principal of food machinery, abandoning the traditional teaching mode of intersecting, a virtual reality technology is adopted in the teaching of food factory equipment and machinery, and a virtual dismounting software is designed, so as to make the principal of food machinery more intuitive for students, and grasp the structure of then well. Finally it can improving and deepening the students' unstanding and recognition of the food machinery, and achieve the goal of improving class teaching effectiveness.