The delineation of comealed granite bodies seems to be the key to the prospecting for concealed metallic deposits. Based on the research achievements gained in recent years, the author, using mainly aeromagnetic survey, has delineated more than90 concealed granite bodices,summed up their prognostic indicators and the methods for outlining these bodies and estimating their buried depths, es[ecially the method for delineating weakly magnetic-nonmagnetic rock bodies,and dealt with their distribution regularity. In addition, a tentative discussion is given on metallogenic specializations of granite bodies with different types of magnetic fields as well as prospects of ore prospecting at depth.