To　solve　the　problem　of　workload　and　low　measuring　accuracy　in　existing　calibration　method　of　traffic　speed　deflectometer,　a　new　calibration　method　based　on　measurement　method　was　proposed.　The　new　calibration　method　changed　Doppler　laser　position　by　step　process　to　making　all　doppler　laser　sensors　outside　the　scope　of　deflection　basin　and　the　corresponding　improvement　scheme　for　equipment　construction　was　put　forward.　The　test　results　show　that　the　calibration　method　has　better　precision　from　evaluation　indicators　of　relevance,　Pearson　correlation　coefficient　and　the　measured　deflection　basin　slope　curve　than　that　of　existing　calibration　method,　and　the　measurement　result　is　an　approximation　of　Backman　beam　to　ensure　the　quality　of　the　deflection　measurement.　The　new　calibration　method　has　a　good　practicability　and　the　maneuverability　is　strong　because　it　spends　less　calibration　time.　©,　2015,　Beijing　University　of　Technology.　All　right　reserved.