In order to improve the gloss of cathodic electrophoretic coatings，epoxy resin was reacted with amines and neutralized to synthesize water-soluble cationic polymer dispersions，which were mixed with quaternary ammonium salt dispersed resins to obtain ahigh gloss cathodic electrophoretic coating pigment paste. Meanwhile，the effects of epoxy equivalent of the main resin，epoxy resin type，blocking agent and isocyanate type of blocked isocyanates，P/B，and paste fineness on the gloss of cathodic electrophoretic coatings werestudied. The results showed that when the epoxy equivalent of the main resin was controlled to400-500 g/mol，the cationic polymer dispersion was prepared using dimeric acid modified epoxy resin，the blocked isocyanate curing agent was synthesized using toluene diisocyanateand ethylene glycol butyl ether，the P/B of the coating was controlled at around 0. 2，and the color paste fineness was ≤15 μm，the high gloss cathodic electrophoretic coating could beprepared. The film of the cathodic electrophoretic coating showed excellent mechanical，salt spray resistance，and certain artificial accelerated weathering properties.