Abstract: In order to obtain the distribution laws of wind speed and gas concentration in the three-dimensional space of roadway of fully mechanized mining face, adopting the research methods of field measurement and theoretical analysis, taking 14205 fully mechanized face of Shaqu Coal Mine as the research object, gas concentration and wind speed in fully mechanized coal face during production period and maintenance period were measured. The distribution laws of wind speed and gas concentration in fully mechanized mining face from three spatial directions of working face roadway strike direction, working face advance direction and perpendicular to working face floor direction were analyzed respectively. The results showed that the roadway section area near the coal wall was best area for wind measurement, and the roadway area which was near the coal wall and at the lower half section of roadway in front of half length range of coal face and the roadway area which was near the gob and at the upper half section of roadway in the length of the second half of coal face were key monitoring areas of gas concentration.