The invention provides a method for producing urea peroxide. The method comprises the following steps: introducing molten urine into a dissolving tank after urine from a urea synthesizing tower is subjected to primary and secondary evaporation purification, and preparing a urea saturated solution from the urine; then, adding into a tubular reactor by virtue of a metering pump, and simultaneously adding hydrogen peroxide having concentration of 30 percent or above and a stabilizing agent which is 1-2 percent of the mass of urea into the reactor, wherein the stabilizing agent is prepared by mixing monopotassium phosphate and polyethylene glycol in a ratio of 1:1; reacting the urea, hydrogen peroxide and the stabilizing agent in the tubular reactor to generate a urea peroxide solution; cooling the solution by virtue of a cooler, and separating out the urea peroxide crystal, centrifuging the mixed liquid by virtue of a centrifugal machine to remove urea peroxide mother liquor; drying the urea peroxide crystal in a drier to prepare a urea peroxide product, packaging and warehousing. According to the method, urea and urea peroxide can be co-produced, continuous production can be realized, yield can be greatly improved, product stability is high, and raw material cost can be reduced.