Gas Roots flowmeter with gas leakage detection device

The utility model relates to a gas roots flowmeter with a gas leakage detection device, which comprises a gas pipeline body, a gas roots flowmeter body sleeved at the bottom of the gas pipeline body, a gas inlet formed in the top of the gas roots flowmeter body, and a detection device body arranged in the gas inlet, clamping grooves are formed in the two opposite outer walls of the gas conveying pipeline body, two opposite mounting grooves are formed in the gas roots flowmeter body, threaded assemblies are arranged in the two mounting grooves, and the two ends, close to each other, of the two threaded assemblies are connected with the two clamping grooves in a clamped mode respectively. Two threaded sleeves can be stably connected with two clamping grooves in a clamped mode through rotation of two screw rods, so that the gas roots flowmeter body achieves the effect that the gas roots flowmeter body is stably installed on the gas conveying pipeline body, limiting teeth can be stably meshed with limiting rings