The invention relates to a trigger-delay based real-time simulation control method which belongs to the technical field of industrial control. The method comprises the following steps: establishing a real-time simulation control platform, establishing a controlled object model in a trigger mode by adopting the Simulink technique, generating an executable program of the controlled object model by adopting the Real Time Workshop technique, and downloading the executable program in a target machine with a real-time working core. In the control method, a two-way circulating trigger signal with a rising edge and a falling edge is designed, the control signal and the trigger signal are transmitted to the controlled object model on the target machine via an analog output interface, and then the output of an error between the controlled object model and a reference signal is collected by the delay mechanism. The error signal serves as the next input signal for the control method to enable thesynchronous operation of the controlled object model and the control method. The trigger-delay-based real-time simulation control method can verify the reliability of the control method and the hardware performance of the board, and can reduce the consumption of the digital-to-analog/analog-to-digital conversion card and reduce the test cost.