This paper divided for the first time the Cenozoic volcanism in the Chifeng area into Oligocene epoch cycle (24-33 Ma), Late Miocene epoch cycle (6-10 Ma), Pliocene epoch cycle (4. 8 Ma), and Pleistocene epoch cycle (0. 89 - 0. 16 Ma). A tendency of the Cenozoic volcanism getting younger and the source of magma getting deeper gradually form southeast to northwest is brought to light by the space-time distribution and the petrologic and geochemical characteristics of the Cenozoic basalts.