The invention relates to the field of gas parameter measurement of a coal mine gas drainage pipeline, in particular to a gas flow parameter measurement device of the coal mine gas drainage pipeline. By the gas flow parameter measurement device, the problems of large measurement workload, low working efficiency, low drainage effect and high potential risk of a pipe group in the prior art are solved. The gas flow parameter measurement device of the coal mine gas drainage pipeline comprises a control mechanism and a pressure measurement mechanism, wherein the control mechanism comprises a three-way connector I, a three-way connector II and a three-way valve which are arranged vertically, an air inlet in an upper end of the three-way connector I communicates with an air outlet of a lower end of the three-way valve, plugs are embedded at an air outlet of a left end of the three-way connector I and an air outlet of a left end of the three-way connector II, the pressure measurement mechanismcomprises a steel pipe I, a steel pipe II, a pressure meter I, a pressure meter II, a straight-through valve I and a three-way connector II. The gas flow parameter measurement device is simple in structure and ingenious in design and is applicable to the field of gas parameter measurement of the coal mine gas drainage pipeline.