Tungsten alloy shielding is the first choice of radiation shielding, it can be used in the medical field and industrial field, compare with the traditional shielding material(such as lead),the shielding function of Tungsten alloy is much better than others, due to its high density, the volume of Tungsten alloy is 1/3 smaller than lead, but shielding functions is equivalent, they also are used as collimators and shielding members for 『adiotherapy and syringe shield.