Freezing is recognized as one of the important technology in food preservation. Considering the change of physical characteristics in beef under the process of the freezing, the equivalent heat capacity method was utilized to process latent heat in phase change, and then the computational fluid dynamics (CFD) numerical simulation technology was applied to simulate the freezing process and establish the differential equations of three dimensional food freezing process. Through the numerical simulation of freezing time, the error between each experimental measuring point (T1, T2, T3, T4 and T5) value and simulation calculation of freezing time were detected to be 5.45%, 3.9%, 5.8%, 4.24%, 5.8%, respectively, and each point temperature real-time simulation of the average error was 1.79 ℃. The results showed that the numerical simulation could predict the beef to freeze time well.