The utility model relates to a fast fast apparatus of mine drilling gas discharge is applicable to the colliery drilling of the direct spot test in the pit gas discharge speed that has gas power calamity. It comprises a rubber rubber tube, two graduated flask, a communicating pipe, an unable adjustment base, an air guide room, time-recorders that have the air guide mouth. During survey drilling gas discharge speed, is connected rubber rubber tube and drilling earlier, air guide room switch cut out this moment, and gas is gaseous when surveing gas discharge speed, opens air guide room switch through in the atmospheric dilution of air guide room, and the time-recorder is triggered at this moment, and while gas is no longer in the atmospheric dilution, but poured in the graduated flask through the air guide room. Time-recorder and graduated flask take notes gas flush time and volume respectively, but the gas speed of flushing in the quickly determine drilling from this, this apparatus simple structure, convenient to use, it is with low costs, excellent in use effect.