Poplar specimens（Populus tomentosa）from plantation grown trees were intermittently pressed by a hydro-thermal method to make surface compressed wood.The surface density of the wood was 1.0 g/cm ,3, with unchanged inner density.The surface compressed wood was then treated with 0.3 MPa of pressurized steam and normal pressure steam, respectively.It showed that the spring ratio of compressive deformation of the wood decreased as treating temperature increased and that the wood treated with pressurized steam performed better than the wood treated with normal pressure steam as far as fixation of compressive deformation was concerned.The thickness change of the wood could be decreased by 67.38% by treatment under 200 ℃ and 0.3 MPa pressure.