In view of the special conditions of high permeability sand layer in coastal areas.Taking Ruihai inclined shaft as an example,the current status of shaft freezing construction is summarized,and the freezing wall calculation is carried out by means of theoretical calculation and numerical simulation,and the parameters of freezing pipe diameter,of freezing hole spacing and brine temperature are determined.The design of the freezing wall was verified with the monitoring data during the freezing period,which ensured the safety of the freezing construction of the inclined shaft and provided a useful reference for the freezing of shaft in similar strata.