Natural　gas,　coal　and　oil　all　were　known　as　the　three　pillars　of　the　world＇s　primary　energy.　With　the　world　energy　crisis　intensified,　coupled　with　the　natural　gas　has　advantages　of　its　own　high-quality,　clean,　high　calorific　value,　combustion　products　contain　little　environmental　pollution　substance　etc.;　natural　gas　will　become　the　preferred　energy　form　in　the　twenty-first　century.　China　is　rich　in　natural　gas　resources,　but　the　distribution　of　natural　gas　fields　tend　to　fragmentary,　scattered　and　small　features,　due　to　its　location　in　remote　areas,　where　do　not　exist　large-scale　mining　and　the　conditions　for　long-distance　pipeline,　much　of　gas　has　not　yet　been　exploited　and　utilized.　Small　natural　gas　liquefaction　plants　in　this　area　can　play　its　flexible,　mobile　advantages　of　technology　to　solve　these　scattered　gas　fields＇　exploiting　and　transportation　issues.　Accordingly,　small-scale　natural　gas　liquefying　plant　research　has　high　strategic　value　and　broad　market　space.　This　paper　based　on　the　domestic　situation　and　the　single　screw　technology　in　the　key　laboratory　devised　a　small　prizing　type　gas　liquefaction　process,　and　analyses　the　optimization　and　analysis.　©　2011　IEEE.