Thermal history simulation of Apatite Fission Track shows that the thermal structure history in Cenozoic and the relationship between Songliao Basin and Dahinganling Mountain. Uplift of Dahinganling reveals its act character; its velocity shows 5 decreasing phases and 4 increasing ones. Although basin evolvement is quite complex

it behaved as three uplifts and two sedimentations. It is considered here that the relationship between Songliao Basin and Dahinganling includes three styles and 4 phases

that is

basin uplifted with mountain during 65.5—50 Ma; basin subsided while mountain uplifted slowly and basin uplifted rapidly while mountain uplifted rapidly during 50—36 Ma; basin subsided slowly while mountain uplifted slowly and basin subsided rapidly while mountain uplifted rapidly during 36—5.83Ma; the latest phase was the same with the first one.