ZrO2　was　combined　with　dielectric　barrier　discharge　plasma　for　hydrolysis　of　urea　under　ambient　conditions.　Effects　of　discharge　power,　O-2　presence　in　carrier　gas,　repeated　use　of　ZrO2　on　hydrolysis　of　urea,　and　formation　of　byproducts　were　investigated.　Urea　could　be　completely　hydrolyzed　to　NH3　and　CO2　at　87-239　degrees　C　during　the　temperature-programmed　catalytic　process　regardless　of　the　presence　of　O-2　in　the　carrier　gas.　By　introducing　plasma　into　the　catalyst　bed,　urea　could　be　hydrolyzed　under　ambient　conditions,　and　increasing　discharge　power　accelerates　the　hydrolysis　of　urea.　Higher　discharge　power　and　O-2　absence　in　the　carrier　gas　are　favorable　for　increasing　NH3　yield,　suppressing　byproduct　formation　and　reducing　energy　consumption　of　the　plasma-catalytic　urea　hydrolysis　process.　ZrO2　shows　excellent　stability　in　the　O-2-free　plasma-catalytic　urea　hydrolysis　process.　Plasma-catalytic　hydrolysis　of　urea　follows　the　pseudo-first-order　kinetic　model　and　could　be　described　by　the　direct　hydrolysis　reaction.