Two samples of PVC thin slices materials were prepared by KBr pressing slices and tested with FT IR;X ray fluorometer and ICP The results show that:(1) The material quality of one kind of thin slice plastics(Z) are PVC resin,the plastifier containing the ester and a little additive;(2) The other kind of thin slice plastics(Y) consists of PVC resin,the plastifier containing the ester,CaCO 3 and a little additive;(3) The additives of Z and Y kind are same:organic tin as thermal stabilizer,something containing sulphur as light and oxygen stabilizer and TiO 2,as white cozer agent.