The invention discloses an SF6 gas decomposition product analysis device based on Fourier transform. The SF6 gas decomposition product analysis device comprises a primary filter, a sampling pipe, a flow regulating mechanism, an FTIR analysis meter and a waste gas collecting mechanism which are communicated in sequence, wherein the flow regulating mechanism comprises a flow regulating valve, a flow meter and a pressure gage which are connected in sequence, and the inlet of the flow regulating valve is communicated with the outlet of the sampling pipe, while the pressure gage is connected with the FTIR analysis meter; the sampling pipe comprises a sampling pipe body, and a first self-sealing joint and a second self-sealing joint are arranged at the inlet and the outlet of the sampling pipe body respectively, while the first self-sealing joint and the second self-sealing joint are communicated with the primary filter and the flow regulating valve respectively. The SF6 gas decomposition product analysis device provided by the invention can combine gas sampling and gas detection into one body, secondary pollution can be avoided, and the device also has the advantages of being high in detection precision and small in required gas amount and being capable of accurately controlling gas amount.