The quartz MEMS gyroscope is a kind of vibratory gyroscope that makes use of the Coriolis effect.The sensitive chip is in a resonance state during operation, and the mechanical coupling error is its main source of error.The error factors of the mechanical coupling of the sensitive chip are analyzed.The improvement schemes of the decoupling design of the driving and detecting modes,the vibration isolation design and the axisymmetric mass balance design are proposed.The experimental results show that by improving the design,the mechanical coupling error 〖JP2〗of the sensitive chip is effectively suppressed,and the precision and environmental adaptability of the gyro are improved.