NOVELTY - A small skid-mounted single stage mixed refrigerant natural gas liquefaction system comprises natural gas pressurizing block, natural gas deacidifying block, natural gas dehydration block, mixed refrigerants compression block, and liquefied natural gas cold box block which is composed of 1st stage heat exchanger (7), heavy hydrocarbon separator (8), 2nd stage heat exchanger (9), gas throttle valve (10), 2nd stage gas-liquid separator (19), 1st stage refrigerant flow device (20), 2nd stage refrigerant flow device (22), 2nd stage mixer (21), and liquefied natural gas separator (11).    USE - A small skid-mounted single stage mixed refrigerant natural gas liquefaction system (claimed).    ADVANTAGE - Liquefaction process is simple, convenient, and low in energy consumption, and has strong adaptability to different air source.    DETAILED DESCRIPTION - A small skid-mounted single stage mixed refrigerant natural gas liquefaction system comprises natural gas pressurizing block, natural gas deacidifying block, natural gas dehydration block, mixed refrigerants compression block, and liquefied natural gas cold box block which is composed of 1st stage heat exchanger (7), heavy hydrocarbon separator (8), 2nd stage heat exchanger (9), gas throttle valve (10), 2nd stage gas-liquid separator (19), 1st stage refrigerant flow device (20), 2nd stage refrigerant flow device (22), 2nd stage mixer (21), and liquefied natural gas separator (11) in which 1st stage heat exchanger, heavy hydrocarbon separator, 2nd stage heat exchanger, natural gas throttle valve, and liquefied natural gas separator are sequentially connected, liquid outlet of liquefied natural gas separator is connected to natural gas storage tank (23), gas-phase outlet of liquefied natural gas separator is connected to 2nd stage heat exchanger, 1st stage heat exchanger is connected to mixed refrigerant compressor (12) and 2nd stage gas-liquid separator, liquid phase outlet of 2nd stage gas-liquid separator is connected to inlet of 1st stage heat exchanger sequentially connected to 1st stage refrigerant flow device connected to 2nd stage mixer, gas-phase outlet of 2nd stage gas-liquid separator is connected to 1st stage heat exchanger sequentially connected to 2nd stage heat exchanger connected to inlet of 2nd stage refrigerant flow device, outlet of 2nd stage refrigerant flow device is connected to 2nd stage heat exchanger sequentially connected to inlet of 2nd stage mixer, and outlet of 2nd stage mixer is connected to 1st stage heat exchanger sequentially connected to mixed refrigerant compressor. An INDEPENDENT CLAIM is included for liquefaction of natural gas which involves feeding raw material gas in natural gas pressurizing block, compressing, cooling, transferring to natural gas deacidifying block, subjecting to natural gas dehydration block to remove impurities, feeding to 1st stage heat exchanger, cooling, passing to heavy hydrocarbon separator to obtain heavy hydrocarbon at bottom, removing heavy hydrocarbon natural gas using 2nd stage heat exchanger, cooling and liquefying natural gas, passing through gas throttle valve, transferring to liquefied natural gas separator to obtain the liquefied natural gas product from bottom storing in natural gas storage tank, returning gas phase outlet of liquefied natural gas separator to 2nd stage heat exchanger in which 1st stage heat exchanger provides cooling, feeding mixed refrigerant to mixed refrigerants compression block, pressurizing, cooling, transferring to 2nd stage gas-liquid separator, subjecting separated gas phase mixed refrigerant to 1st stage heat exchanger in which 2nd stage heat exchanger provides cooling to refrigerant, passing through 2nd stage refrigerant flow device, returning to 2nd stage heat exchanger, subjecting separated liquid phase mixed refrigerant to 1st stage heat exchanger, cooling through 1st stage refrigerant flow device in which 2nd stage heat exchanger provides cooling to mixed refrigerant, returning to 1st stage heat exchanger, and transferring to mixed refrigerants compression block to complete the refrigeration cycle.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of a small skid-mounted single stage mixed refrigerant natural gas liquefaction system.    1st stage heat exchanger (7)    Heavy hydrocarbon separator (8)    2nd stage heat exchanger (9)    Gas throttle valve (10)    Liquefied natural gas separator (11)    Mixed refrigerant compressor (12)    2nd stage gas-liquid separator (19)    1st stage refrigerant flow device (20)    2nd stage mixer (21)    2nd stage refrigerant flow device (22)    Natural gas storage tank (23)