Abstract: The factors influcncing color quality of plastic products were analyzed using a computerized color-mcasuring instrument.It showed that the basic color of resin，the averag molecular weight and mclting point of polyethylene wax，crystal form of the organic pigment，and surface morphology of pigment particles have significant effects on the color quality of final products.

Key words: color matching, color quality, natural color of resin, polyethylene wax, organic pigment