The invention provides a method for simulating alarming of a hard disk video recorder. The method is characterized in that a hard disk video recorder virtual machine can be used to write an application program to simulate a hard disk video recorder to generate alarming information; the external configuration file of the application program is provided with the number of the hard disk video recorders, the number of the real-time stream channels generated by each hard disk video recorder at the same time, the alarming type and the alarming time triggered by each real-time stream channel. By adopting the method provided by the invention, the alarming information generating time is random, and the generated alarming information type is random.