This　paper　investigates　the　influence　of　secondary　vibration　and　the　time　interval　of　secondary　vibration　on　the　shrinkage　properties　of　freshly　placed　concrete.　In　this　study,　four　sets　of　cylindrical　specimens　with　a　diameter　of　30　cm　and　a　height　of　100　cm　were　designed　with　different　time　intervals　for　secondary　vibration.　By　continuously　monitoring　the　shrinkage　strain　of　concrete　for　17　weeks,　a　calculation　model　for　the　early-age　shrinkage　strain　of　concrete　considering　the　effects　of　secondary　vibration　was　proposed.　Concrete　compressive　strength　tests　and　water　expansion　tests　were　also　designed　to　investigate　the　effects　of　secondary　vibration　on　compressive　strength,　compactness　and　other　properties　under　different　environments.　The　study　results　showed　that　secondary　vibration　mainly　reduced　concrete　shrinkage　during　the　first　three　days,　with　a　reduction　ratio　of　10%-20%,　and　then　stabilized.　The　longer　the　time　interval　for　vibration,　the　smaller　the　shrinkage　strain　of　concrete,　and　the　more　significant　the　improvement　in　compressive　strength　and　compactness,　with　an　increased　ratio　of　15%-30%.　The　proposed　prediction　model　can　consider　the　effects　of　secondary　vibration　and　reflect　the　early-age　shrinkage　variation　of　concrete　during　the　first　seven　days.　After　the　cast　concrete　undergoes　water　absorption　and　expansion,　it　can　shrink　again　under　natural　air-drying　conditions,　and　the　shrinkage　rate　is　not　affected　by　the　time　interval　of　secondary　vibration.