Abstract: Frostresistanceisoneoftheimportantcharacteristicsofplants ， which consistsofinherencecold-toler-ancein unacclimation andincreasedfrost-tolerance during acclimationin antifrostplants. Theinherence cold-toler-ance derivedfrom highercontentofunsaturatedfatty acidin plasmalemma. Theantioxidantdefensesystem ofcellcanfulfilltheantioxidation needsinlow-temperature ， andthecytoskeletoncan beregulatedtoadaptplantstolow -temper-atureconditions. Theincreasedfrost-toleranceoriginatesfrom many activated cold-induced genesand synthesisofalotofcoldshock protein ， which enhancefrost-toleranceofplants.Thispapersummarizedtheadvanceson plantcold -tolerance mechanismsinrecentstudies ， inordertogivetheoreticaldirectiononfrost mitigation and antifrostbreedingofcrops.