Abstract: In order to study the effect of hydration heat and freezing law on frozen wall, in vertical shaft freezing construction of the cretaceous strata, through the analysis of two typical horizon of the field monitoring data, we get the temperature between two walls and the basic change laws of radial load. The two levels of outer wall rapidly increase in temperature after casting, and the freezing pressure development trend is obvious; hydration heat makes two levels keep a longer temperature curing time, also makes frozen wall appear large area temperature rise and partial melting. Through of curve fitting of two levels same depth of freezing average pressure with depth change, we get the average return air shaft freezing stress with depth, the change law of the frozen pressure upper limit is determined.