The invention discloses a high-pressure rotational viscosity meter. The high-pressure rotational viscosity meter comprises a shell composed of an upper cylinder and a lower cylinder, a cylindrical rotor is arranged in the shell, a rotating disc is connected to the upper end of the cylindrical rotor, magnetic steel and a hall rotational speed sensor are arranged on the rotating disc, and a magnetic force conduction device is arranged at the lower end of the cylindrical rotor. The high-pressure rotational viscosity meter is suitable for measuring the viscosity of a lubricating agent in the normal-temperature and normal-pressure states, is also capable of changing experiment pressure so that the viscosity of the lubricating agent in the normal pressure state can be measured, the universal performance of the high-pressure rotational viscosity meter is improved, measurement of viscosity of all kinds of fluid in the different-high-pressure and different-shearing-rate states can be achieved through a measurement device, the research and development cost is effectively reduced.