Abstract: Studying the effdects of the rare-earth elements on some-working people's protogonoeyte hemagglutinin(PHA),alymphocyte non-speciality of abesterase chromosome(ANAE)and cellular immunity of the changing rate of alymphocyte,contrasting those with some non-rare-earth workers,testing their dust density,radiation proportion and radiance,we can find that in the same working age group the rare-earth worker's cellular immunity is clearly lower than the non-rare-earth workers,It shows that the rare-earth working environment has effects on the works'cellular immunity.