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The Half-Rotating impeller thruster(HRIT) based on the Half-Rotating Mechanism is a new type of impeller thruster. Its impeller motion principle is different from the fixed impeller of the ordinary impeller thruster. In order to obtain better aerodynamic force in working, it is necessary to explore the HRIT in different structural parameters. The influence of the radius of the rotating arm, the width of the blade is calculated and analyzed in detail by numerical calculation method. The calculation results show that the radius of the rotating arm is the main factor affecting the lift and thrust of the HRIT. The aerodynamic characteristics of the thruster under different blade widths are also different. The aerodynamic characteristics of the thruster under different blade widths are also different, the lift reaches its peak value when blade widths d=30mm, and the thrust reaches its peak value when d=35mm; The blade lengths also has a great influence on the aerodynamic force of the thruster, and the lift and thrust both increase with the increase of blade lengths. At the same time, compared with the fixed impeller thruster, the HRIT has relatively balanced aerodynamic performance.