键电荷模型将晶体中原子的有效电荷与键长有机地联系起来，从而提供了一种揭示分子晶体结构和电子结构相关关系的方法．键电荷模型的建立被看作是当今无机固体化学的一个重大进展，它具有简洁性、可靠性和实用性的特点．对于晶体中原子的电荷分布，结构畸变的研究和键长的确定有独特之处．值得研究和发展．本文简述了这一模型的基本原理及其应用前景．同时做出了简单的评价． The key charge model organically relates the effective charge of the atoms in the crystal to the bond length, thereby providing a method for revealing the correlation between the molecular crystal structure and the electronic structure. The establishment of a key charge model is considered as a significant advance in inorganic solid chemistry today, with its simplicity, reliability and practicality. For the distribution of atoms in the crystal charge, the study of structure distortion and the determination of bond length are unique. Worthy of research and development. This article briefly describes the basic principles of this model and its application prospects. At the same time made a simple evaluation.