椭圆极化现象是电磁场在导电介质中传播时产生的,为得到准确的相位信息,在计算激发磁场时应考虑椭圆极化。本文研究了地面核磁共振(SNMR)信号相位求取电阻率的基本方法,利用SNMR信号通过广义逆反演法得到电阻率未知情况下的含水率及层位分布,作为相位反演电阻率的先验值,通过模拟退火法实现对电阻率的反演。对SNMR的研究解决了通过相位对电阻率的求取,有利于进一步利用相位信息提高含水层和含水率反演的精度。 Elliptic polarization is the electromagnetic field generated in the conductive medium propagation, in order to get accurate phase information, in calculating the excitation magnetic field should be considered elliptical polarization. In this paper, we study the fundamental method of determining the resistivity of the ground magnetic resonance (SNMR) signal. The SNMR signal is used to obtain the moisture content and horizon distribution under the condition of unknown resistivity by generalized inverse inversion. The value of the inversion, through the simulated annealing method to achieve the inversion of resistivity. The study of SNMR solves the problem of obtaining the resistivity by phase, which is helpful to further utilize the phase information to improve the accuracy of aquifer inversion and water content inversion.