Abstract: The underwater moving target radiation noise simulation technology is widely used in underwater target signal source generation, target recognition algorithm research, sonar training simulation equipment and underwater acoustic countermeasure equipment developments. In order to provide a fast, convenient and effective test method for this kind of research work, the navigation parameters and radiation noise level of the underwater high-speed moving targets are used to establish a mathematical model for the calculation of the received target radiation noise level as the target passes by a relatively fixed measuring point. Based on this, the underwater high-speed moving target radiation noise simulator is designed and implemented. In the simulator, the operating parameters set manually, and the simulated signal of navigation radiation noise is generated after the operating parameters being loaded online and calculated in real time by the embedded computer, and finally output through the underwater acoustic signal transmitter. The experiment shows that the design is reasonable and feasible, and meets the use requirements.