Simulation method of real-time embedded system

The invention provides a simulation method of a real-time embedded system. Firstly, an XMI document is read, and elements of the XMI document are divided into a class diagram element collection and a sequence chart element collection; then the class diagram element collection is converted to be C++ codes; on the basis of the C++ codes of class diagrams, the sequence chart element collection is converted to be C++ codes; a Simulink model is converted to be C++ codes through a Simulink Coder, clock interrupt is added, and the C++ codes become real-time codes; then the C++ codes and the real-time codes are combined together according to the set in a class diagram model, an executable file can be compiled and generated, the executable file operates on a target platform, then the simulation of the whole real-time embedded system is achieved, and a test result is given. According to the method, automatic codes of the class diagram model, a sequence chart model and the Simulink model based on UML can be generated, time constraint information is extracted, simulation is carried out by executing the generated codes, and a result report whether the time constraint of the system is met or not is given.