The invention relates to a method for predicating UHT milk shelf life, comprising the steps of: setting a free lipase content value of UHT milk under a normal temperature T2 as a shelf life reference value, while the storage time and the storage temperature under the shelf life reference value meet an equation: Logt=A/T+M, wherein t means the storage time, T means the storage temperature, A meansthe characteristic coefficient, M means the correlation coefficient; checking the free lipase content of UHT milk stored under an actual storage temperature T1, substituting T1 and t1 into the equation when the free lipase content value reaches the shelf life reference value in the actual storage time t1, to calculate A; substituting M, A and T2 into the equation, to calculate the shelf life t2 of the UHT milk under normal temperature. The invention builds a method for predicating UHT milk shelf life, which can find the shelf life of a new developed UHT product in short time, to convert the developmental achievement into economic benefit.