Abstract: Geochemistry of lanthanides in late Paleozoic coal from Weibei were studied by means of mathematical statistics methods. It was discovered that not only REE chondrite-normolized in any geological changed with their +3 ionic radius, but also the ratio of REE among the different geological changed with their ionic radius. It is another manifestations of “the effect on geochemistry of Lanthanides” found. According to this effect, the migration, distribution and enrichment between different coal or other geological could be comparative discussed qualitatively, and it may become a new manner to study geochemical tracer of REE.