Drying experiments for plantation grown Poplar （Populus×euamericana cv.Ⅰ-214）lumber were conducted by radio frequency/vacuum （RF/V） drying method under various RF/V conditions. The drying speed and drying quality of the lumber were determined. A reasonable RF/V drying schedule was established and test results showed that under this RF/V drying condition, Poplar lumber could be dried efficiently and rapidly resulting in good quality lumber compared with the common steam drying method or the high-temperature vapor drying method.