我国在五十年代后期开始研究和应用电磁法。最初推广应用的是高频感应法。因为它频率高、异常多、一时又很难确定异常的性质，所以时间不久就没有人再用这个方法。1965年在长江中下游结合找铜又推广大迴线的实虚分量法。1966年起，这个方法只在一两个省内试验性的应用，也没有得到推广。后来，大专院校和科研单位虽又介绍过几种电磁法，但因后期 In the late 1950s, China began to study and apply the electromagnetic method. The initial promotion of the application of high-frequency induction method. Because of its high frequency, anomalous, and sometimes very difficult to determine the nature of the anomaly, so time soon no one to reuse this method. 1965 in the middle and lower reaches of the Yangtze River to find copper and promote the real line of the real virtual component method. Since 1966, this method has been applied tentatively in one or two provinces and has not been promoted. Later, universities and research institutes introduced several electromagnetic methods, but later