An experimental platform was established to study the influence of gas pressure on SF 6 decomposition characteristics under AC corona discharge. Content variation of typical products including SOF 2 , SO 2 F 2 , SO 2 , CO 2 under different pressures and the influence mechanism was observed and analyzed in detail. The results indicate that the contents of all four typical products decrease with the increase of pressure. The values of ϕ(SOF 2 +SO 2 +SO 2 F 2 )/ϕ(CO 2 ) and ϕ(SO 2 F 2 )/ϕ(SOF 2 +SO 2 ) present an overall decreasing trend with pressure. Besides, relational model between content of products and pressure was proposed. The value of CO 2 could be imitated by a quasi-linear fitting equation: f(P)=(a/(P+b))+c. The variation trend of the contents of three sulfur-containing products with the pressure could be fitted by a function of f(P)=(ae −bP )/(P 2 +cP+d).