Abstract: Disulfide bond-based dynamic self-healing polyurethane coatings possess intrinsic self-healing capability. However, the introduction of photothermal fillers usually leads to declined healing efficiency due to filler aggregation and physical obstruction. To address this issue, polydopamine-modified reduced graphene oxide (PDA@rGO) was fabricated as a multifunctional photothermal filler, and was further introduced to prepare photothermal-enhanced dynamic bond self-healing anti-corrosion coatings. The π–π interaction between PDA and rGO effectively alleviated filler aggregation, and improved the dispersion and interfacial compatibility of rGO in the polyurethane matrix. Meanwhile, benefiting from the outstanding photothermal conversion effect, PDA@rGO enabled rapid temperature rise of the coating under light irradiation, thus activating the dynamic exchange of disulfide bonds to promote self-healing. Results showed that PDA modification significantly improved the dispersion of rGO. The 0.5wt% PUS-GP coating reached 71.1℃ after 5 min of xenon lamp irradiation. The filler hindered the self-healing process at room temperature, while the healing efficiency was remarkably restored under photothermal stimulation, demonstrating a “room-temperature hindrance and photothermal compensation” synergistic mechanism. Electrochemical impedance spectroscopy (EIS) verified that the composite filler greatly enhanced the barrier performance of the coating. The 0.5wt% PUS-GP coating exhibited a low-frequency impedance of 8.08×10⁷ Ω·cm², with an impedance recovery rate of 87.34% after light irradiation. The as-prepared coating integrated excellent mechanical properties, hydrophobicity and corrosion-resistant self-healing performance, providing a new strategy for the design of intelligent protective coatings in metallic corrosion protection.