Long　forging　production　cycle　and　low　equipment　utilization　are　the　important　problems　currently　facing　domestic　die　forging　ring　production　lines.　To　solve　this　problem,　a　simulation　optimization　method　for　die　forging　production　line　based　on　Flexsim　was　proposed.　Firstly,　the　ECRS　theory　method　was　used　to　analyze　the　bottleneck　process　of　the　production　line.　Then,　built　a　logistics　simulation　model　of　die　forging　production　line　based　on　Flexsim,　The　parallel　and　cycle　processing　steps　was　set　reasonable　parameters　and　simulated.　Next,　through　logic　analysis,　methods　such　as　adding　processing　equipment,　improving　equipment　efficiency　and　balancing　equipment　handling　tasks　were　used　to　optimize　and　improve　the　production　line.　Finally,　compared　and　analyzed　the　original　and　optimized　model.　The　simulation　results　show　that　the　optimized　production　line　equipment　task　allocation　tends　to　be　rationalized,　the　equipment　utilization　rate　is　increased　by　4.34%,　and　the　product　cycle　time　is　reduced　by　27.65%,　and　optimized　planning　and　design　are　achieved.　©　2020　Institute　of　Physics　Publishing.　All　rights　reserved.