At　present,　how　the　application　of　connected　vehicle　technology　will　affect　drivers＇　driving　psychology　needs　to　be　explored.　As　an　important　part　of　driving　psychology,　driving　confidence　can　guide　drivers　to　operate　calmly　when　facing　a　complex　traffic　environment,　which　has　an　important　impact　on　reducing　accident　rates　and　improving　traffic　efficiency.　Based　on　the　driving　behavior　data　in　the　expressway　work　zone　under　a　connected　vehicle　environment,　this　study　mainly　analyzed　the　difference　between　the　psychological　characteristics　of　drivers　with　warning　information　or　without　warning　information　when　facing　the　work　zone　ahead.　Firstly,　based　on　driving　simulation　technology,　the　expressway　work　zone　scene　in　a　connected　vehicle　environment　was　designed,　and　the　on-board　human-machine　interface　was　used　to　provide　warning　information　of　the　work　zone　ahead.　Secondly,　the　difference　of　drivers＇　driving　confidence　in　psychology　when　driving　with　or　without　warning　information　was　analyzed　by　using　the　characteristics　of　average　vehicle　spatiotemporal　diagram　and　gas　pedal　angle.　Finally,　a　method　of　quantifying　driving　confidence　was　proposed,　which　used　a　kind　of　objective　weighting　method　to　get　the　weights　between　different　indicators.　Based　on　this　method,　drivers＇　degree　of　driving　confidence　under　two　conditions　was　calculated.　The　results　showed　that　connected　vehicle　technology　could　affect　drivers＇　driving　confidence　in　psychology　when　facing　the　work　zone　ahead.　In　the　connected　vehicle　environment,　82.9%　of　drivers＇　degree　of　driving　confidence　would　increase,　and　the　average　degree　of　driving　confidence　with　warning　information　was　10.9%　higher　than　that　without　warning　information.　©