Abstract: Disadvantages of CO₂ stored and transported in cylinders of high pressure at normal temperature is analyzed in the article. In the light of foreign technique that CO₂ is stored and transported at low temperature, introduced are CO₂ liquifying procedure and flow process of its low temperature storage and transportation. Analysis shows that a single but double-stage ammonian cooling compressor, Model No. S₈~12. 5A can be used as the host compressor which can meat the heat demand for CO₂ low temperature liquification. Long distance CO₂ transportation can be carried out by CO₂ low temperature tank cat reequipped with the chassis of Honghe truck JN-151, a CO₂ storage vessel, an instrument case, a pressure booster and liquid hose. It is pointed out that CO₂ stored and transported at lower temperature can speed up the CO₂ charging race and increase storage and transportation effect thus bring high economic benefit.