Abstract: To characterize the process and mechanism of the CRT dryig schedule two common species of Chinese commerical timbers (Pinus koraiensis and Fraxinus mandshurica) were used for trials in an experimental drying kiln. Results revealed that CRT and Medium-High Temperature (MHT) drying schedules are both significantly effective in reducing the drying period without any additional degradation percentage as compared with the conventional kiln drying schedule. Furthormore, there were no detrimental effects on MOR、MOE as well as on toughness, except shearing strength which was found 10% less than timber dried with the conventional schedules.The drying qualities including the wood strength properties were evaluated with a result almost equivalent to those dried with MHT schedule, and the drying period was shortened to some great extent. In this experiment P. Koraiensis timber was found more suitable for CRT drying process than F. mandshurica wood.Some schedules were proposed for further consideration and trials.