<p>Although considerable efforts have investigated the strengthening effects of carbides on laser-cladded alloy coatings, the effects of different carbide types on coating properties remain insufficiently clarified, and relevant strategies for regulating carbide types via alloying element modification have been rarely reported. In this paper, the effects of in situ synthesized carbide hard phases on the microstructure and properties of laser-cladded AlCoCrFeNi-C high-carbon high-entropy alloy (HC-HEA) coatings were studied. The results demonstrate that designed four HEA coatings exhibit a BCC/B2 matrix with different types of carbides at the grain boundaries. Specifically, the primary carbide formed in both the AlCoCrFeNi-C and AlCoCrFeNiMo_0.2-C coatings is M₇C₃. With the further addition of W, the AlCoCrFeNiMo_0.2W_0.2-C coating precipitates M₇C₃, M₂₃C₆, and M₆C multiple types of carbides. By simultaneously reducing the Cr content, the AlCoCr_0.5FeNiMo_0.2W_0.2-C coating achieves a single M₆C carbide, which is more beneficial to hardness, crack resistance, and high-temperature stability than M₇C₃ and M₂₃C₆. This coating reaches a maximum hardness of 879.3 ± 10.5 HV_0.5 after aging at 600&#xa0;°C, with no cracks observed at the tips of the microhardness indentation. Meanwhile, the M₆C carbide remains stable after aging at 800&#xa0;°C. In contrast, the other three coatings undergo carbide transformations: M₇C₃ → M₂₃C₆ and M₂₃C₆ → M₆C. Furthermore, due to the enhanced crack resistance imparted by the discrete single M₆C phase, the coating exhibits better high-temperature wear performance compared to the other coatings at 600&#xa0;°C. Therefore, this work reveals an effective approach to tailor carbide types in HC-HEA coatings. The superior performance of the AlCoCr_0.5FeNiMo_0.2W_0.2-C coating is attributed to the exclusive formation of M₆C carbide.</p>