Abstract: According to the characteristics of digital circuit, virtual instrument platform has been introduced in experiment teaching. Taking the trigger virtual experiment design for example, this paper presented the principle and design method of digital circuit virtual experiment based on LabVIEW. The digital circuit simulation using LabVIEW does not only make up for the deficiency of the traditional experiments, enriching the teaching methods and means, but also enhances the students’ interest in learning, and improves teaching quality.