The main noise of tilt-rotor aircraft comes from the propeller, and the noise has a great impact on the efficiency of pilots. Based on the analysis of the noise effect to the pilots, the flow field of the designed rotor propeller is analyzed by the computational fluid dynamics method (CFD). The aerodynamic performance parameters of the rotor propeller, such as the thrust and power performances, are obtained by numerical calculation. The thrust coefficient CT and power coefficient CP of the propeller decrease with the increase of the advance ratio J. The propeller"s propulsion efficiency increases first and then decreases with the increase of the advance ratio J. the propeller"s propulsion efficiency reaches above 0.87 around the design point. Lowson method is used to analyze the radiated noise of the propeller. With the increase of the rotating speed of the propeller, the directivity of the total sound pressure level in all directions is consistent and improved.