To　improve　the　shared　parking　participation　of　parking　space　providers　(O-user)　and　parking　space　users　(P-user),　a　double　auction　mechanism　of　shared　parking　space　under　reservation　system　is　designed.　The　allocation　of　parking　space　is　discussed,　which　is　of　great　significance　to　the　efficiency　of　shared　parking.　The　influencing　factors　and　mechanism　of　O-user　and　P-user＇s　bidding　behaviors　were　analyzed　based　on　Engel-Kollat-Blackwell　consumer　purchase　decision　model.　Considering　the　heterogeneity　of　temporal　and　spatial　attributes　of　shared　parking　space,　a　double　auction　mechanism　was　designed.　To　ensure　the　real　bidding　of　users,　the　pricing　mechanism　of　shared　parking　space　based　on　Vickery-Clarke-Groves　(VCG)　price　algorithm　is　adopted　to　calculate　the　final　price　paid　by　users,　and　the　algorithm　is　designed　from　three　aspects:　time　constraint,　space　constraint,　and　price　constraint.　The　research　can　provide　theoretical　basis　and　data　support　for　formulating　the　auction　strategy　of　shared　parking　space.　©　ASCE.