By use of a model,the quantitiy of expendable ice for Safely transporting three vegetables in winter and spring were evaluated according to the data of 39 deliveried stations in North China,North East China and North West China ,6 common carraiges,traditional keeping fresh measures and the meteorological conditions of the stations along the railway.Also a sample is analysed and demonstrated.It provides the scientific basis for the production and transportation departments to determine the guantity of expendable ice.