High purity helium recovery plant supplier and method, the recovery device comprises: a pressure reducing valve, a temperature controller and a flow controller sequentially connected to the pressure reducing valve through a pipeline, a pressure sensor connected to the flow controller, and The first-stage three-way valve connected to the pressure sensor, the first-stage membrane separator connected to one end of the first-stage three-way valve, the one-way valve connected to the upper layer of the first-stage membrane separator in turn, a gas compression mechanism and The nitrogen reservoir is connected to the second gas compression mechanism and the second temperature controller in the lower layer of the first-stage membrane separator through the pipeline, and the second-stage three-way valve connected to the second temperature controller.The high purity helium recovery plant supplier of the present invention can separate the mixed gas of helium and nitrogen, thereby obtaining high-purity helium and nitrogen, which can be used for the next pressure test, thereby avoiding the waste of gas, reducing the test cost, and having a compact structure. , the storage space is not greatly increased