By Combining quasi-steady lifting line theory of propeller in wake field with 2-D cavitating cascade theory, a practical method has been presented and its computgram is available to predict the fluctuating pressure induced by a cavitating propeller. Corresponding validations are reported in this paper as well. By Combining quasi-steady lifting line theory of propeller in wake field with 2-D cavitating cascade theory, a practical method has been presented and its computgram is available to predict the fluctuating pressure induced by a cavitating propeller. Corresponding validations are reported in this paper as well.