本发明属于化工领域,提供了一种简单、高效降低工业尿素中缩二脲含量的方法。以工业尿素为原料,无水甲醇或无水乙醇为萃取剂,向原料中加入萃取剂;连续搅拌条件下进行萃取,萃取温度为20℃~50℃,萃取时间为1h~10h,萃取温差为3℃~10℃;抽滤、室温干燥至恒重,即得提纯后的尿素;所述的工业尿素中缩二脲含量为0.86%-0.94%;本发明的整 The invention belongs to the chemical field and provides a simple and effective method for reducing biuret content in industrial urea. The industrial urea is taken as raw material, anhydrous methanol or absolute ethanol is used as the extracting agent, the extracting agent is added into the raw material; the extraction is carried out under continuous stirring, the extracting temperature is 20-50 DEG C, the extracting time is 1h-10h, the extracting temperature difference is 3 ℃ ~ 10 ℃; suction filtration, dried at room temperature until constant weight, to obtain purified urea; the content of biuret in the industrial urea is 0.86% -0.94%; the whole