Unfrozen　water　retention　curve　(UWRC)　defines　the　relationship　between　temperature　and　unfrozen　water　content　in　frozen　soils.　Although　many　models　have　been　proposed　for　the　UWRC,　these　existing　models　cannot　predict　UWRC　well　over　a　wide　temperatures　range.　In　this　study,　a　new　UWRC　model　is　proposed　with　explicit　considerations　of　both　capillarity　and　adsorption.　In　this　model,　capillarity　is　considered　dominating　when　the　freezing　of　soil　pore　water　at　higher　temperatures　(above　−2 °C),　whereas　the　effects　of　adsorption　pronounce　at　temperatures　below　−2 °C.　Moreover,　effects　of　void　ratio　on　the　freezing　of　capillary　water　are　incorporated.　The　proposed　model　was　applied　to　predict　UWRCs　of　silt　and　clay　at　different　initial　void　ratios　over　a　wide　temperature　range　(from　−50　to　0 °C).　Predicted　results　by　this　new　model　are　compared　with　predictions　by　three　well-known　existing　models.　The　new　model　can　capture　the　density　effects　on　UWRC.　Moreover,　the　new　model　can　predict　better　UWRC　over　a　wide　temperature　range　since　it　explicitly　considers　both　effects　of　capillarity　and　adsorption.　©　2021,　The　Author(s),　under　exclusive　license　to　Springer　Nature　Singapore　Pte　Ltd.