Based　on　a　questionnaire　of　driver　psychological　and　behavioral　reaction　under　emergency,　this　paper　improved　the　Gipps　car-following　model　and　proposed　a　new　emergency　evacuation　car-following　model　based　on　the　minimum　safety　distance.　The　model　contains　statistical　distribution　of　driver　behavioral　differential　and　experiential　estimate.　Compared　with　car-following　models　which　were　established　under　normal　traffic　condition,　it　can　be　more　really　reflecting　actual　traffic　state　under　emergency　evacuation　by　incorporating　driver　mental　and　behavioral　reaction　into　model　development.