Precision casting production of casting a forming, no or less machining can be used, is a kind ofadvanced casting process. Because of the high precision castings to the size and surface roughness requirements, so the whole process of any problems with a link can cause the casting scrap.Here are the influencing factors on the quality of the precision casting under simple introduction: die material and its determinants additive ingredients on the casting surface quality. Composition, pouring temperature has important effect on the overall quality of the castings. Gating system is scientific and reasonable. 4, coating adhesive, curing agent had a great influence on the casting gating.