Downhole gas compression technology is a kind of artificial lifting technology and one of the latest natural gas pressurization technologies abroad.It aims to maximize recovery and delay the production life of gas wells.In order to analyze the research status of downhole compression technology,through expounding and analyzing the research status,working principle and critical technology of downhle gas compression technology and analyzing the device structures of Coarc Grup and Upwing Company,the key design points of downhole gas compression are obtained,that is, the technology of adopting high-speed permanent magnet motor to drive compression module, gas bearing, power supply technology of downhole compression module, etc.And the influencing factors of the efficiency of the technology are analyzed in order to provide reference for domestic colleagues in the development and process research of downhole gas compressor.