本文为了探讨磁异常中正负异常形成的规律，开展了平面展了强磁铁平面模拟实验及等值线制作工作，为了准确数据判断磁性体空间位置及个数，开展了分量转换、化极、求导等数据处理数及转换工作。最后得出①磁化方向的不同是形成正负异常的根源②利用△Z分量转换后数据用于进行垂直二阶导数的计算能更加准确的确定磁性体的空间位置及个数。

In this paper, in order to explore the magnetic anomalies in the form of positive or negative anomaly，Carried out a graphic show strong magnet plane simulation experiment and Contour mapping，In order to accurately judge the data magnetic space location and the number，carried out the component conversion、reduction to the pole、derivation, etc data processing and conversion work。Finally obtain①Different magnetization direction is to form a source of positive and negative anomalies②Used △Z component conversion data For the calculation of the vertical second derivative could more accurately determine the spatial position of the magnetic body and number。