Vehicle　purchase　restriction　policies　greatly　influence　people＇s　behavior,　especially　their　participation　in　the　license　plate　lottery.　This　paper　focuses　on　the　socioeconomic　characteristics　and　psychological　factors　of　citizens　participating　in　the　license　plate　lottery,　which　can　serve　as　a　reference　for　policy　makers　aiming　to　guide　rational　participation　in　the　lottery.　A　Multi-Index　and　Multi-Causal　model　were　established　based　on　social　psychology,　combined　with　the　Theory　of　Planned　Behavior　(TPB).　Perceived　car　necessity,　perceived　behavioral　control,　car　ownership　attitude　and　subjective　norms　were　regarded　as　four　latent　psychological　variables.　Furthermore,　the　behaviors　of　license　plate　lottery　participants　in　cities　with　purchase　restriction　policies　were　statistically　analyzed　from　the　perspectives　of　personal　socioeconomic　characteristics　and　psychological　factors.　The　empirical　research　results　reveal　that　the　socioeconomic　attributes　of　citizens　have　different　degrees　of　influence　on　latent　variables.　Perceived　car　necessity　is　observed　to　have　a　significant　direct　impact　on　a　citizen＇s　behavioral　intention　to　participate　in　the　lottery,　which　is　also　affected　by　perceived　behavioral　control.　Car　ownership　attitude　has　the　strongest　impact　on　citizen　behavior　towards　participating　in　the　license　plate　lottery,　followed　by　subjective　norms,　perceived　behavioral　control,　and　perceived　car　necessity.　More　specifically,　the　economic　benefit　associated　with　perceived　behavioral　control　is　identified　as　the　critical　factor　in　further　promoting　participation　in　the　license　plate　lottery.