Natural gas gathering and transportation pipeline leakage simulation device and method

The invention relates to a natural gas gathering and transportation pipeline leakage simulation device and method. The simulation device comprises a simulation pipeline which is provided with an air inlet, an emptying port and at least one leakage hole; an air supply system; an emptying system; and a plurality of sensor unit groups respectively arranged at the leakage hole and two sides of the leakage hole along the axial direction of the simulation pipeline, wherein the group comprises a plurality of sensor unit rings which are sequentially arranged at intervals along the radial direction, and each sensor unit ring comprises a plurality of sensor units which are arranged around the circumference of the simulation pipeline; wherein the sensor unit includes at least one of a temperature sensor and a concentration sensor. The sensor units are arranged in a space near the leakage hole according to a specific mode to form a leakage monitoring area near the leakage hole, and the sensor units can select temperature