Abstract:Resent horizontal deformation field in the northeastern margin of QinghaiTibetan plateau was analyzed,using GNSS observation data from 2011 to 2013.The results indicate that:The horizontal movement from 2011 to 2013 is obviously,with the rate of 15mm /a or lower;The direction of principal compressive strain is SENW,with the strain rate of ±40×10-9/a,The region of maximum main strain locates in the south of the study area in a belt;Dominent surface shrinkage indicates that the strain energy is accumulated in compressional way,the largest surface shrinkage value mainly distributed in the southeast corner;The regings with maximum shear strain rate are showed as belts,one of them is Qilian Tectonic Belt,another is in the south of the study area,parallelling with the Belt;Leftlateral area and dextral area distribute in belt.