By comparing testing results of drying lumber from fast growing plantation species with and without surface pressuring,the authors proved that different surface pressure affected wood drying warp distortion.But a phenomenon existed that surface pressure of 9 800～10 780 N (1 000～1 100 kgf/m 2) was effective on restraining wood drying warp distortion for thin lumber of populus tomentosa,Pinus taeda and Larix olgensis, and ineffective for thin timber of Robinia pseudoacacia,Pinus massoniana,Pinus elliottii and Larix kaempferi.The reason should be studied further.