Abstract: To solve the easy exposure problem of modern active sonar, the Pseudorca crassidens click signal is proposed as the active sonar transmitting signal waveform for detection to achieve low interception of sonar detection. Firstly, the resolution performance of the Pseudorca crassidens click signal is analyzed by broadband ambiguity function. Secondly, the interception factors of Pseudo crassidens click signal and conventional active sonar signal under the mono-static and bi-static sonar detection model are compared by simulation to verify its low interception. The results show that the three-dimensional broadband ambiguity function of the Pseudorca crassidens click signal presents an ideal "thumbtack" shape with a time delay resolution of 7.644×10^-6 s and a frequency shift resolution of 7.405 Hz, which shows a good resolution performance. The interception factor of Pseudo crassidens click signal is between -4.887 dB and -17.6 dB, which is always less than 0 dB and far lower than the conventional active sonar signal, showing the very excellent low interception performance. As a sonar transmitting signal, Pseudo crassidens click signal can realize effective and low interception sonar detection.