Torrefaction can be defined as a biomass pretreatment stage via heating at a moderate temperature between 473 and 573 K in inert condition to produce higher energy density, longer shelf life, better grindability and higher reactivities for gasification or liwuefaction.Although the phenomenon itself has been known for long time, recently torrefaction has been attracting many researchers in the field of biomass conversion as a new technology due to the reasons above.In this study, three types of Malaysian wood feedstock namely acasia, seraya and golden powder with particle size of 250-500 m were torrefied at 523 and 573 K.A fixed bed reactor was utilized and nitrogen was used as inert gas.The objective of the research was directed to measure and discuss the change in the calorific value and the CHO content of the torrefied woods.