Based on traditional torsion balance gravitation constant G is mesured and laser interference is used measure deflect angle. To eliminate environment effect, magnetic field is used.

• 摘要在扭摆法测量引力常量的基础上，提出利用激光干涉法测扭转偏角，并采用磁感应力来消减周围环境的噪声干扰，能使引力常量G的测量精度有很大提高。