Abstract: Biomass pyrolysis and Maillard reaction were discussed in this article. Maillard reaction existed not only in biomass pyrolysis, but also could be facilitated to produce high value-added compounds, such as pyrazine by adding defined ammonia. The condensable gas was condensed into two types of bio-oil which could be used for chemical and fuel, respectively. The former could be served as material to obtain valuable chemicals by separation and extraction, while the latter could be used to burn in boiler or kiln. The economy of biomass fast pyrolysis process would be considerably improved when the Maillard reaction was introduced.