The utility model provides a pair of portable SF6 decomposed gas body detection device based on raman spectroscopy, comprises a box bod, detecting system include the SF6 gas sampling unit, with the detecting element of SF6 gas sampling unit intercommunication and with detecting element electrical connection's process control unit, need not carry out the preliminary treatment to sample gas in the testing process, need not moreover to contact with gaseous in the testing process to guaranteeing the gaseous original characteristic of sample, and do not receive external environment's interference in the testing process, having improved the precision of testing result greatly, equipment structure is simple moreover, conveniently carries, makes and convenient to use low cost.