By considering (2+1)-dimensional non-isospectral discrete zero curvature equation,the (2+1)-dimensional non-isospectral Toda lattice hierarchy is constructed in this article.It follows that some reductions of the (2+1)- dimensional Toda lattice hierarchy are given.Finally,the (2+1)-dimensional integrable coupling system of the Toda lattice hierarchy is obtained through enlarging spectral problem.
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