Driving　comfort　is　a　research　object　involving　human　factors,　the　evaluation　process　is　dependent　on　human　factors,　and　the　evaluation　results　have　probability　characteristics.　Firstly,　the　related　research　on　pavement　performance　perception　using　smart　phones　were　summarised.　On　this　basis,　the　driving　data　acquisition　experiment　was　carried　out,　the　smartphone　is　used　as　the　driving　data　acquisition　equipment,　the　probability　representation　method　of　driving　comfort　of　pavement　evaluation　unit　based　on　driving　vibration　process　and　vibration　comfort　is　studied,　and　a　comfort　classification　range　of　the　vector　synthetic　vibration　index　was　determined　comprehensively.　Finally,　the　comfort　probability　of　different　vibration　ranges　was　quantified　with　reference　to　the　Sigmoid　function.　From　the　point　of　view　of　the　distribution　of　driving　vibration,　the　probability　evaluation　index　F　of　driving　comfort　with　the　influence　of　vibration　difference　was　put　forward,　which　reflects　the　possibility　for　drivers　to　evaluate　the　road　section　in　terms　of　driving　comfort.