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长偏移距瞬变电磁测深法（LOWTEM）作为电法勘探中的一门新兴技术，其研究与应用在我国尚属探索阶段，其测量数据的处理与解释也仅局限于定性范畴。为了使该方法获得的大量时间域数据能够得到快速准确的处理和定量解释，本文提出了一种实用的资料处理与解释方法，内容包括：①利用密集采样的感应电动势曲线积分求取随时间变化的垂直磁场值；②以垂直磁场定义全区视电阻率，然后采用数值迭代法求取电阻率曲线；③对计算结果进行时频转换；④引入MT反演方法对时频转换视电阻车曲线进行反演。通过模型试算，证明该方法能够较好地解决多解性问题，实现了全区解释，提高了解释精度，具备了现场解释的能力。
As a new emerging technology in electrical prospecting, LOWTEM is still in the exploratory stage in China. The processing and interpretation of its measured data are limited to qualitative categories. In order to obtain a large number of time-domain data obtained by this method can be quickly and accurately processed and quantitatively explained, this paper presents a practical method of data processing and interpretation, including: ① using intensive sampling induced electromotive force curve integral with time Of the vertical magnetic field value; ② defined by the vertical magnetic field apparent resistivity, and then use the numerical iterative method for calculating the resistivity curve; ③ the results of the time-frequency conversion; ④ MT introduction of time-frequency conversion of the resistance curve Inversion. Through the model trial calculation, this method proves that the method can solve the problem of multiple solutions better, realize the interpretation of the whole area, improve the precision of interpretation, and has the ability to explain on the spot.