CNG integrated substation: The trailer supplies gas to the compressor through the air discharge column,and then pressurized the compressor to the set pressure (18~25MPa). The high and medium pressure gas storage cylinder group is filled with gas. in this process, the highand medium pressure gas is sold to the outside by the gas selling machine, and the low pressure gas isdirectly charged by the trailer. To complete, the trailer direct charging medium pressure bottle group is used when the trailer pressureis high. The sub-station compressor of the non-station gas storage system adopts the integrated technology and has the advantages. Small land, low investment, fast results, mobile, low energy consumption, intelligence, high efficiency,energy saving, safety and other characteristics. The model is adaptable and suitable. The construction of stations in the field, the construction of stations in areas with small urban planningarea, the need to transfer stations irregularly or supplement other busier filling stations, etc