在验证磁异常时，常常注意正异常，把钻孔布在正异常峰值附近，一般能取得一定效果，但由于斜磁化的影响，有时在正异常内只能打到矿体的边部或见不到矿。本文将讨论在斜磁化条件下，无限延伸厚板状体上顶面的投影位置在垂直磁异常中的变化规律，以便准确地布置钻孔。 In the verification of magnetic anomalies, often pay attention to the positive anomalies, the cloth hole in the normal anomaly near the peak, generally can achieve some results, but due to the influence of oblique magnetization, and sometimes positive anomalies can only hit the edge of the ore body or see Less than mine. This article will discuss the variation of the projection of the top surface of an infinitely extended slab under perpendicular magnetization anomalies under oblique magnetization conditions in order to accurately position the borehole.