Covalent organic frameworks (COF) arise as the new frontier among the enormous research efforts in functional materials. Due to their well-defined channel structure, tunable porosity, larger surface area, vast synthetic diversity and facile functionalization at the molecular level, COF has emerged as a matrix for heterogeneous catalysts. Such catalysts are generally constructed via the "bottom-up" strategies from building blocks. Utilizing a simple post- modification strategy, COF catalysts are prepared by loading metal particles or ions into the pores or interfaces. Benefiting from its structural superiority, COF catalysts with excellent catalytic activity will also make a great achievement. Here, this review focuses on recent advances of COF-functional catalysts, by briefly summarizing their synthetic strategies, targeted functionalization, and their perspectives in heterogeneous catalysis.

Contents
1 Introduction
2 Pd catalytic coupling reaction
2.1 Suzuki reaction
2.2 Sonogashira reaction
2.3 Heck reaction
3 Knoevenagel condensation
4 Redox reaction
5 Diels-Alder reaction
6 Michael addition
7 Solid acid catalysis reaction
8 Photocatalytic hydrogen production
9 Conclusion and outlook