PC-3 nucleating agent is mainly applicable to homopolymerization and railless copolymerization polypropylene products as well as LLDPE film. It can not only directly mix, inject mold or extrude molding with resin, but also mix and make transparent agglomerate (2.5-5%) with other additives first, and then mix and use with common polyolepine, the addiction level of PC-3 nucleating agent in polypropylene is 0.1-0.3%. Add PC-3nucleating agent to PP powder lot, mix them, and then conduct processing. Add small amount of white oil to PP powder lot, mix uniformly and then disperse PC-3nucleating agent on them, and intensively agitate. The suggested addiction level of white oil is 20-0ml/50kgPP. PC-3 nucleating agent can also been used together with other additives for plastics.