An　innovative　study　on　the　high　strength　of　U　shaped　steel　plate　was　carried　out.　Through　the　two　different　cooling　systems　of　hot　stamping　die　obtained　the　two　U　shaped　steel　plates,　founding　that　the　cooling　rate　of　U　shaped　steel　plate　obtained　by　bath　water　cooling　system　in　the　die　was　significantly　higher　than　the　steel　plate　obtained　by　cooling　pipe　in　the　die　system,　and　had　a　smaller　temperature　difference,　Which　is　a　good　solution　to　the　problem　the　cooling　rate　of　blank　decreases　with　the　thickness　of　blank　increasing　and　the　blank　had　a　large　temperature　difference　for　badly　uniform　temperature　quenching.　This　system　is　also　greatly　shorten　the　quenching　time　and　improve　the　production　efficiency　in　hot　forming　process.　©　2020　Trans　Tech　Publications　Ltd,　Switzerland.