针对地下半空间存在三维异常体及覆盖层情况，计算了垂直磁偶极子的场，计算结果表明σ１与σ２接近时，覆盖层影响减小；σ１增加时覆盖层影响增大；对于不同的σ２／σ１值，场幅值对高频（ｆ≥２ｋＨｚ）和低频（ｆ≤１０Ｈｚ）都明显减小，只有在２ｋＨｚ≥ｆ≥１０Ｈｚ之间，场幅值可达最大。还表明垂直磁偶极子的场具有较强的岩性识别和分层能力 For the existence of three-dimensional anomaly body and overburden in underground half-space, the field of perpendicular magnetic dipole is calculated. The calculated results show that the influence of overburden layer decreases when σ1 and σ2 are close to each other. The influence of overburden layer increases with the increase of σ1. σ2 / σ1 value, the field amplitude of high frequency (f ≥ 2kHz) and low frequency (f ≤ 10Hz) are significantly reduced, only in 2kHz ≥ f ≥ 10Hz, the maximum field amplitude. It is also shown that the vertical magnetic dipole field has strong lithology identification and delamination ability