Working method, system and device of helium compressor test bed

The invention discloses a helium compressor test bed, belongs to the technical field of helium compressor test beds, and particularly relates to a working method, system and device of a helium compressor test bed. A whole tested unit (helium compressor assembly) is placed in a low-temperature and low-pressure test box body, and the box body reaches the required test temperature through a refrigeration module; the box body is firstly vacuumized, then helium is injected, and then fine adjustment vacuumizing is performed to reach target pressure; tested unit circulation is completed in the test box body; a compressor outlet pipeline is connected with an external heat exchanger and performs heat exchange; gas enters a machine and is discharged from a base below the machine; the compressed gas enters an independent heat exchanger through a pipeline to cool the compressed heated gas to a temperature required by a test environment, and then the cooled gas is discharged into a main test bin to ensure that the dischar