Abstract: In order to reveal the influence of geometric parameters on the hydrodynamic performance of controllable pitch propellers，both the controllable pitch process and the blade section distortion are simulated based on the principle of coordinate transformation，and the hydrodynamic performance of controllable pitch propellers is predicted by means of the panel method． First，with the propeller JDC7704 at the initial pitch as the research objective， the proposed simulation method is proved to be correct by comparing the numerical results of the hydrodynamic parameters with the data of the open water experiment． Then，by adjusting the pitch angle，the effects of initial advance coefficients，rake angle，skew angle，blade area ratio and hub diameter ratio on the hydrodynamic performance of controllable pitch propellers are discussed． The results show that the initial advance coefficients，rake angle，skew angle and blade area ratio have significant effects on the blade spindle，and the degrees and tendencies of the effects change under different pitch conditions．

Key words: hydrodynamic performance, controllable pitch propeller, panel method, geometric parameter