The invention provides a two-dimension decoupling motion platform, which comprises a fixing platform seat and a moving platform arranged on the fixing platform seat, wherein the moving platform comprises a horizontal moving platform and a vertical moving platform; the horizontal moving platform comprises four horizontal flexible poles, a horizontal elastic element and a horizontal piezoceramic actuator; the horizontal flexible poles are arranged around the horizontal moving platform; the horizontal elastic element is arranged on one side of the horizontal moving platform; the horizontal piezoceramic actuator and the horizontal elastic element are arranged symmetrically; the vertical moving platform comprises four vertical flexible poles, a vertical elastic element and a vertical piezoceramic actuator; the vertical flexible poles are arranged around the vertical moving platform; the vertical elastic element is arranged on one side of the vertical moving platform; and the vertical piezoceramic actuator and the vertical elastic element are arranged symmetrically. The two-dimension decoupling motion platform is driven directly by the piezoceramic actuators to acquire nanoscale displacement output; rigidity of the motion platform is improved by the flexible elements; and motion is transmitted by the elastic mechanism, so that reliable high-rigidity two-dimension decoupling positioning motion is realized.