The utility model provides a processing system suitable for rich acetylene torch gas, this system is including parallelly connected accident discharge system who sets up and a small amount of discharge system, the utility model discloses an it each other discharges the pipe network pressure -fired for reserve purge system, assurance flare system to set up fuel gas and nitrogen gas, to acetylene gas characteristics, rationally set up the spark arrester, when contingency took place the tempering, the spark arrester is the back -fire relief effectively, set up oxygen content analysis appearance real -time supervision torch barrel top oxygen content on line, fundamentally reduces the possibility that the effluent gas takes place detonation, tempering, torch barrel bottom sets up the drainage, because the acetylene burning very easily produces the carbon black, the mixed steam lime set of carbon black falls into torch barrel bottom, with this sewage automatic discharge, prevents to contain the dirty water blocking stopper spark arrester of carbon black, causes and suppresses the pressure.