［Objective］In order to overcome the shortcomings of traditional coatings，such as easy damage and cracking，inconvenient detection and short protection life，this paper studies a compositecoating integrating self-healing and self-warning. The self-healing is humidity-responsive，which can automatically restore coating damage and prolong service life without additional external stimulation.The self-warning function can also prompt defects with instant fluorescence，so as to realize low-cost on-site monitoring，so as to realize long-term corrosion resistance and intelligent response of the coating.［Methods］ The HHPC core-shell nanofiber membrane with bionic microvascular network structure was prepared by one-step coaxial wet electrospinning technology，using hexamethylene diisocyanate（HDI）dispersed with 1，1，2，3，4，5-hexaphenylthiophene（HPS）as the core solution and polyacrylonitrile（PAN）doped with carbon nanotubes（CNTs）as the shell solution. Subsequently，the HHPC/EP composite coating was obtained by rotating the epoxy resin.［Results］The microstructure of the coating was characterized by scanning electron microscopy（SEM） and transmission electron microscopy（TEM）. The chemical structure was analyzed by Fourier transform infrared spectroscopy（FT-IR），and the successful encapsulation of the core material was verified. The excellent mechanicalproperties were confirmed by tensile test. Furthermore，the corrosion protection performance of thecomposite coating was tested by electrochemical impedance spectroscopy（EIS） and salt spray test system.［Conclusion］It was found that when the micro-damage occurred in the composite coating system，the active substances encapsulated in the microvascular network were released，and HDI was cross-linked to form a polyurea molecular network under the action of water. While restoring thephysical barrier function of the coating，the spatial interaction between HPS molecules was limited，so that it emitted bright green fluorescence，thus realizing the dual functions of self-healing and self-warning of micro-damage of the coating.