Abstract: The primary numerical experiment on nesting two different models was done using a global spectral model and a limited fine mesh model. In the paper, we have primarily studied the scheme flow for nesting the two different models, the time separation in changing the lateral boundary variate of the limited fine mesh model and the starting time of the limited fine mesh model. we find that using the variate or the tendency of the variate is both useful as nesting ways;that the time separated for changing the lateral boundary value of limited fine mesh model must neither be too long nor too short;and that the two models starting at the same time with the same initial data or adopting the 12 hour forecast result of the global spectral model as the initial data of the limited fine mesh model are giving the basically the same result.