Run through DTH hammer is one of the necessary equipment of air reverse circulation drilling technology in continuous sampling. The RC 50 Hollow DTH hammer is applied in the China Gold Group Wushan Copper Mine, and achieved good results. Focusing on the RC 50 DTH structure, principle, performance and application effect are introduced in Wushan Copper Mine, so that the majority of the industry have a better understanding of the imported products to promote the process of domestic, imported equipment, so that the mineral resources of our country to develop and use more reasonable, improve comprehensive economic benefits.