Abstract: This paper uses the time series InSAR and GPS technologies to obtain the three-dimensional surface deformation in Beijing Plain. It analyze its spatial distribution and evolution characteristics. The results show the following findings. (1)Under the Quaternary additional stress field caused by pumping,the three-dimensional surface deformation characteristics are significant in Beijing Plain. The vertical deformation is the main component and horizontal displacement is a supplement. (2)Land subsidence are mainly located in the east,north and south part of Beijing plain. There are multiple subsidence centers,and the overall trend is slowing down. The most serious subsidence areas are distributed in east part of Chaoyang District and parts of Tongzhou District. The subsidence rate has exceeded 100 mm·a^-1 for many years. The maximum subsidence rate is 143.20 mm·a^-1,the maximum accumulated subsidence is 816.77 mm,and the uneven subsidence is obvious. (3)Under the ITRF2005 reference frame,the horizontal direction of GPS points in the plain are consistent,mainly in the SE direction. The dominant movement direction is NE112.5°~NE113.8°. The movement rate of E direction is 27.12~36.19 mm·a^-1,and the average rate is 30.78 mm·a^-1. The movement rate of N direction is -10.90~-19.73 mm·a^-1,and the average rate is -13.57 mm·a^-1. They reflect that the continuous deformation in Beijing plain is under the situation of a unified continental dynamic environment. (4)Under the Eurasian reference frame,the horizontal movement rate of GPS points are significantly reduced. The deformation between GPS points is varies with no consistent change trend. In particular,in joint area of several major active faults,where both of the InSAR derived vertical subsidence rate and the GPS horizontal movement rate are large. The horizontal movement direction of the GPS points generally direct to the center of subsidence or the funnel of the groundwater level,or from the high water level to the low water level area. This is mainly caused by the horizontal deformation of the Quaternary aquifer system caused by the extraction of groundwater.