Abstract: In order to study the variations of volatile aroma components during the concentrating process of reconstituted tobacco production, volatile aroma components were extracted by simultaneous distillation and extraction (SDE) method. A total of 234 components were separated by gas chromatography (GC) and identified by time of flight mass spectrometry (TOFMS). The results showed that:1) The average loss of the total volatile components during concentrating was about 30%, in which the contents of carboxylic acid esters, nicotine and neophytadiene were reduced by about 71.32%, 73.15% and 54.46%, respectively. Meanwhile, the concentrating process was accompanied by the generation of some new aroma components. 2) About 32% of volatile aroma components were transferred from extract solution to concentrated evaporation condensate, in which the transfer amounts of alcohols, fatty acid esters, alkanes and neophytadiene were 50.67%, 54.31%, 62.55%, and 63.25% respectively. 3) The content of volatile aroma components in white water was negligible, while nicotine content at 7.93 g per ton of white water.