Abstract: The frogman is a serious threat to ports and underwater facilities. Radiation noise generated by the frogman vehicle is an important basis for the passive sonar detection of underwater frogmen. In this paper, the acoustic tests of frogman vehicle, including anechoic pool test and sea test, are designed. The purpose is to obtain the noise characteristic data radiated by the frogman vehicle, such as sound source level, directivity, power spectrum, LOFAR spectrum and DEMON spectrum, which provides an actual data support for the warning detection of underwater frogman vehicle.