紧束缚近似是计算固体中电子能带的重要方法.近期一篇文章错误地运用紧束缚近似计算了六角密堆积晶格能带，得到了复数的能量本征值.本文指出了其计算中的教条性错误，给出了正确的计算方法和结果，并且对能带的对称性，极值点，高对称路径上的布洛赫函数特性以及受次近邻交叠积分的影响进行了详细讨论.

The tightbinding approximation is an important method for calculating electron energy bands in solids. Recently, an article incorrectly applied the tightbinding approximation to calculate the energy bands of hexagonal closepacked (hcp) lattice, resulting in complex energy eigenvalues. This paper identifies the doctrinal errors in their calculations, presents the correct calculation methods and results, and provides a detailed discussion on the symmetry of the energy bands, the extremal points, the characteristics of Bloch functions along highsymmetry paths, and the effects of nextnearest neighbor overlap integrals.