A high-resolution paleomagnetism study was made at two parallel sections of
Nihewan group at Xujiayao paleolithic site. More than 10m reversed polarit
ies were found at the middle-low parts of both sections. According to the K
-Arages of volcanic beans near by the sections, it is derived that the reve
rsed polarities should be the Matuyama reversed polarity zone. The Blake re
versed excursion reported previously was denied.