This paper reports the trace element geochemistry characteristics of the Permian volcanic lavas in Inner Mongolia, North China, and disscusses the chemical char a cteristics of the lava source region, which demonstrates that the Permian volcan ic rocks were the production of mantle partial melting with different melting pe rcentages. The mafic rocks show the depleted mantle characteristics with high me lting parcentages of EMORB, and the felsic rocks desplay the characteristics o f OIB mantle with low melting parcentages, which probably have undergone the cont amination of crustal material.