In order to enable undergraduates to understand the operation process before the experiment of engineering fluid mechanics, a terminal virtual simulation experiment platform was built. Students complete the virtual simulation experiment by clicking the corresponding controls, of which the interface was made by the HTML5 web language. For avoiding of students’ escaping or operating negatively, the Apache Tomcat container was set up and login information and operation processs of students were sent to the Java background as a sending request through the Ajax technology, thus realizing the back-end recording and taking the the data as the permission to real experiment. Taking the Reynolds experiment as an example, the operation process and effect of virtual simulation experiment platform were introduced, so as to improve students’ proficiency of experiment and promote the experiment teaching quality.