In order to increase the hydrophobic effect of curing agent and reduce theaffinity of curing agent with water，improve the water and corrosion resistance of waterborne coatings，hydrophobic amine 4，4'-diaminodicyclohexylmethane（H₁₂MDA）was selected to replace hydrophilic amine to prepare high-performance waterborne curing agent. We testedthe properties of the waterborne epoxy coating，especially the sag resistance，hot water immersion resistance and salt spray resistance. The results showed that waterborne curingagent with high performance was prepared by using the mass ratio of triethylenetetramine（TETA）to H₁₂MDA of 1∶1，it had long pot life（4h）and short tack-free time（only 20 min）； it could be thick coated with 275 μm without sagging；also it showed good water resistance and salt spray resistance；it could be boiled for 10 h and soaked in hot water（50 ℃）for more than 15 d without bubbling，salt spray resistance could exceed 600 h.