In　order　to　explore　the　influence　of　driver＇s　characteristics　in　complex　traffic　flow,　experienced,　inexperienced　attribution　and　the　perception　headway　of　the　driver　are　introduced.　Concurrently,　an　extended　car-following　model　is　established.　The　linear　stability　of　the　extended　model　is　derived　based　on　the　control　theory　method,　and　obtains　the　stability　conditions.　This　work　verifies　the　impact　of　driver　characteristics　on　traffic　flow　stability　based　on　the　open　boundary　simulation　environment.　The　research　results　show　that　inexperienced　driver　will　reduce　the　stability　of　traffic　flow　on　complex　roads,　while　experienced　driver　will　improve　the　stability　of　traffic　flow.　Compared　with　the　driver＇s　negative　perception　headway　error,　the　positive　perception　headway　error　can　improve　the　stability　of　traffic　flow.　More　specifically,　an　experienced　driver　is　good　at　predicting　the　state　of　the　preceding　vehicle,　while　the　driver＇s　positive　perception　headway　error　tends　to　narrow　the　safe　headway,　and　achieve　the　stability　of　traffic　flow.