Abstract: Taking Beishan region as the main studying area,the major regulations and characteristics of Mesozoic structural-magmatic activities and mineralization are discussed. It is supposed that the studying area,where mineralization occurred in tensively and widely,had been strongly influenced by geotectonic activities of offshore west Pacific Ocean in the period of Indosinian-Yanshanian which is an important mineralization period. Finally,some thoughts and suggestions for studying prospecting copper and polymetallic depositin this area have been put forward.