The real－time monitoring program of flight test data is an indispensable and important supporting tool in the test flight of large civil aircraft. With the continuous deepening of the networked test system, a large number of complex flight test parameters poses a huge challenge for the development of monitoring programs. Based on the WPF(Windows Presentation Foundation) platform, this paper designs a system for developing real－time monitoring programs for flight test data by making use of XAML files, reflection and DataBinding. The system realizes the rapid integration and management of the monitoring program by dragging and displaying the control, shortening the preparation cycle from several weeks in the past to several hours; when the system is running, the three－layer architecture can drive hundreds of monitoring terminals in real time. The system has provided technical support for the the domestic large－scale passenger aircraft in the maiden flight and forensic flight test.