Abstract: Practical teaching has a strong supporting effect on the professional personnel training system for the major of building electricity and intelligence. In the offline teaching process, it is often limited by many factors such as venue, number of equipment, class hours, and safety. At the same time, part of teaching content under actual combat background can’t be carried out. To overcome the above shortcomings, a professional practice teaching platform is developed based on the virtual simulation technology and the platform is applied to the course teaching. Practice has shown that the mixed virtual simulation teaching effect of online and offline based on this teaching platform is good, and it is of great significance to improve the quality of talent cultivation in this specialty.