To achieve high-efficiency catalysts for CO₂ reduction reaction, various catalytic metal centres and linker molecules have been assembled into covalent organic frameworks. The amine-linkages enhance the binding ability of CO₂ molecules, and the ionic frameworks enable to improve the electronic conductivity and the charge transfer along the frameworks. However, directly synthesis of covalent organic frameworks with amine-linkages and ionic frameworks is hardly achieved due to the electrostatic repulsion and predicament for the strength of the linkage. Herein, we demonstrate covalent organic frameworks for CO₂ reduction reaction by modulating the linkers and linkages of the template covalent organic framework to build the correlation between the catalytic performance and the structures of covalent organic frameworks. Through the double modifications, the CO₂ binding ability and the electronic states are well tuned, resulting in controllable activity and selectivity for CO₂ reduction reaction. Notably, the dual-functional covalent organic framework achieves high selectivity with a maximum CO Faradaic efficiency of 97.32% and the turnover frequencies value of 9922.68 h⁻¹, which are higher than those of the base covalent organic framework and the single-modified covalent organic frameworks. Moreover, the theoretical calculations further reveal that the higher activity is attributed to the easier formation of immediate *CO from COOH*. This study provides insights into developing covalent organic frameworks for CO₂ reduction reaction.

_{为了实现CO 2}还原反应的高效催化剂，各种催化金属中心和连接分子已组装成共价有机骨架。胺键增强了CO ₂分子的结合能力，离子骨架能够改善电子电导率和沿骨架的电荷转移。然而，由于静电排斥和键强度的限制，直接合成具有胺键和离子骨架的共价有机骨架很难实现。在此，我们展示了 CO _{2的共价有机框架}通过调节模板共价有机框架的连接体和键合来进行还原反应，建立催化性能与共价有机框架结构之间的相关性。通过双重修饰，CO ₂结合能力和电子态得到很好的调节，从而实现CO ₂还原反应的可控活性和选择性。值得注意的是，双功能共价有机框架实现了高选择性，最大CO法拉第效率为97.32%，周转频率值为9922.68 h ^-1，高于基础共价有机骨架和单一修饰的共价有机骨架。此外，理论计算进一步表明，更高的活性归因于更容易从COOH*直接形成*CO。这项研究为开发用于 CO ₂还原反应的共价有机框架提供了见解。