Abstract: In Brder to choose magmatic sulfide deposits faster and more economical from mafic and ultramafic intrusions,we try to discuss ore-hearing potential evaluation index system.The evaluation index system consists of tectonic setting,the nature of magma source region,original magma,rock types,mag..matic differentiation degree,mass balance,magmatic water content,assimilation,mineralogy,chemistry of rock-forming minerals,geochemical of major elements,geophysical and geochemicaI anomalies.The index system is set up initially,it requires a continuously deepening and irztproving process.