［Objective］The objective of this study is to prepare a fast-drying，medium-resistant， and tough polyamide-based aqueous epoxy curing agent.［Methods］ A polyamide intermediate containing three terminal amine groups（JXA-4D） was first synthesized in one step via a Michael addition reaction using maleic anhydride（MA）and 4，4'-diaminodicyclohexylmethane（H₁₂MDA）as raw materials. Subsequently，the polyamide waterborne epoxy curing agent（MK-165）was synthesized from JXA-4D，a composite polyamine，epoxy resin（NPEL-128）， and polyethylene glycol diglycidyl ether（PEGDGE）. The thermal properties of MK-165 were then analyzed.［Results］The FT-IR results showed that JXA-4D and MK were successfully synthesized. The prepared JXA-4D exhibited a short-chain high-branched structure with three terminal amine groups. Its low viscosity and high amine valuesignificantly improved reactivity and crosslinking density. MK-165，synthesized from JXA-4D curedNPEL-128 had a stable synthesis process and showed good universality to a variety of epoxy primers.The two-component waterborne epoxy coating prepared with MK-165 exhibited excellent mechanicalproperties，with the cured film achieving both high hardness（3H）and good flexibility（1 mm bend test）. The curing speed was fast，the working time was 4 h at room temperature，while maintaining curability in low-temperature environments. Furthermore，the coating demonstrates long-lasting media resistance，including 720 hours of salt spray resistance and 960 hours of water resistance.［Conclusion］ A polyamide curing agent was successfully prepared based on the Michael addition method. Whenapplied in two-component coatings，the hardness and curing speed of the coatings were effectively maintained. These findings provided a useful theoretical basis and research foundation for the subsequent development of novel polyamide curing agents.