The method for optimization the geometric parameters of turbine meter rotor is put forward on the base of the viscous mathematic model of turbine meter. And a team of geometric parameters of turbine flow meter, which is non-sensitive to viscosity change, is obtained in theory. 基于所建立的涡轮流量传感器粘性数学模型,提出了传感器叶轮几何参数的优化方法,并在理论上获得了粘度不敏感涡轮流量传感器的叶轮几何参数。