As the core component of the satellite attitude control system, the hemispherical resonator gyroscope (HRG) is affected by the radiation environment in the space application field，and its charging and discharging effect is one of the key factors threatening the satellites safety. The paper introduces the influences of charging and discharging effect of the hemispherical resonator gyroscope sensitive unit. The material base of sensitive unit is analyzed, the measures of protection design in charging and discharging effect and the shell shield layer thickness of sensitive unit are presented，which reduces the influence of charging and discharging effect on the sensing head. The analysis and test results show the feasibility and practicability of the design.