Biochar briquettes have advantages of higher energy volume density and durability, as well as the convenience for storage and transportation. In this paper, the effects of temperature and O-2 concentration on gas yields and biochar briquettes physical properties were investigated. The yields of H-2 and char decreased with the increase of temperature and O-2 concentration. An increase in the temperature and O-2 concentration led to an increase in CO2 and CO yields. The CH4 yield reached the highest value of 23.46 g/kg at 800 degrees C with 4% O-2 . Higher temperature than 600 degrees C and O-2 concentration than 6% were not good for the volume density and durability rating but were beneficial for the porosity of biochar briquette. The BET surface area and total pore volume of O-2 -char was higher than those of N-2-char produced at the same temperature. Considering comprehensive analysis of temperature requirements, char yield and physical properties, 500 degrees C and 6% O-2 were the optimal oxidative pyrolysis conditions.