Steep foundation uneven settlement affects the stabilization of railway roadbed.Based the field tests and numerical simulation on Neimah railway steep embankment construction the slope ratio，foundation backfill nature，filling height，roadbed compaction degree to steep embankment and it influence on differential settlement were examed.The conclusion shows that embankment slope ratio has some influence on the vertical deformation of subgrade and the larger differential settlement and larger slope ratio results in the increasing total settlement，ground slope has a significant impact on the subgrade settlement and the differential settlement increases with the increasing slope，filling height has a strong impact on foundation settlement and the greater deformation differences leads to the larger variation of the fill section. Filling the elastic modulus has a strong impact on the total settlement of embankment and the embankment differential settlement with the increase of differential settlement modulus gradually decreases.