As a particular mechanism of land salinization

freeze-thaw action is differing from salification process by violent evaporation

it has distinct control action on springtime salification

but it has not been much accounted adequately. In the process of feezing and thawing

soil profile constitution is divided into three layers frozen layer

semi-frozen layer and unfrozen layer

special travel of water and salt was made.In the process of soil freezing

soil water and salt move towards fozen layer from the underlayers

salinity in the frozen layer increased evidently. In the process of soil thawing

the salinity of frozen ayer assembles in the upper soil layer along with violent vaporizing in springtime. Its intensity level of salification like“eruption”this time

the land salinization has no relation with ground water table

because frozen layer by way of waterproof layer insulate unconfined water. So it is unauthentic that the critical depth of unconfined water controlled that“eruption”salification in springtime.