Numerous geochemical anomalies delineated by 150 000 drainage sediment survey in northern Hebei are weak and gentle anomalies or single element anomalies. In the "high, large and comprehensive" anomaly areas,a bunch of large and medium size deposits such as the Fengning silver deposit have been discovered, and in the low anomaly areas,some medium and small size deposits such as the Wanquansi deposit and the Chapeng deposit have also been detected,which proves that low anomalies at favorable structure positions and volcanic intrusive areas also have good indicating significance.