In this study, the CORE-IAF (Coordinated Ocean-ice Reference Experiments - Interannual Forcing ) dataset is used to force two ocean models: LICOM3 (LASG/IAP Climate System Ocean Model Version 3) and POP2 (Parallel Ocean Program version 2). The North Equatorial Countercurrent (NECC) simulated by these two models has been found weaker than the observation. These results are consistent with the findings of Sun et al (2019), which further suggests that the surface wind stress and its curl is the most important forcing term for correctly simulating the NECC in ocean models. At the same time, the differences in NECC dynamical mechanisms between LICOM3 and POP2 are also analyzed, including the wind stress, advection and other terms. In spite of the same CORE-IAF dataset is used to force these two ocean models, the influences of dynamical forcing terms (the wind stress, advection and other terms) are not exactly same.