Abstract: There were twenty two artifacts found in five Paleolithic sites in Lin
an county in 2004, one of which was excavated from the Xia Shu loess, and the others were collected from the surface. The proportion of tools made of thick flakes is much higher than that of Xi Tiao River region. The artifact from Xia Shu Tu layer belongs to upper Paleolithic, and the ones with reticulate marks belong to middle to lower Paleolithic, while the ones without reticulate marks are no earlier than the age of reticulate red earth.

Key words: Lin'an county; Paleolithic; Reticulate red earth