The preparation of coating with good flexibility and high hardness had importantapplication value，however，it was difficult to balance the flexibility and hardness，which were contradictory properties. By combining the hard inorganic phase with the flexible organic phaseat the molecular level through organic-inorganic hybridization，the coating could obtain thepolymer-like flexibility and ceramic-like high hardness at the same time. Further endowing thecoating with functions such as transparency，hydrophobicity and oleophobicity，antifouling，and self-healing，could extend the applications of coating in flexible display devices and marineantifouling. This paper reviewed the research progress of functional flexible hard coating andsummarized the relationship between structure and property. Finally，the future of the field was expected. Realizing the multifunctional integration of coating and use in extreme environmentswould be an important research direction for functional flexible hard coating.