The invention relates to a urea jet valve. A valve disk is arranged inside an ejector, a magnetic coil component, a spring upper seat, a spring, a spring upper seat, an armature iron, a bushing ring and a packing washer are sheathed on the valve disk in sequence; the urea jet valve is characterized in that a sealing ring is sheathed on the valve disk which is connected with the sealing ring by means of interference fit. The sealing ring is made from elastic fluorubber. The valve disk and the sealing ring are connected by cementing agent in interference fit. The lower end of the packing washerpresses upon an outer ring of the upper surface of the sealing ring. The integrated structure of the urea jet valve of the invention is compact and reasonable; a sealing element and the valve disk are contacted to achieve reliable sealing, hydraulic pressure bearing strength and shock resistance by the holding force generated by the elastic deformation of the sealing element; the sealing element with elasticity can deform and resist corrosion, thus improving durability of the sealing element; in addition, the sealability is stable and the service life is long; moreover, the purpose of completely separating a magnetic valve from liquid is fully achieved and the sealability of a pressure leading-in chamber of the urea jet valve is improved.