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In order to find novel leading structures of pesticide,a series of N-(pyrimidin-5-yl)-N’-phenylureas(4a-4h) were designed and synthesized from 4-chloro-2-diethylamino-6-methyl-5-nitropyrimidine 1 via substitution,reduction and acylation procedures. Preliminary bioassay showed that all the target compounds processing good anti-TMV(tobacco mosaic virus) activity.Two compounds(4d and 4e) displayed higher activity superior to virazole at a concentration of 5.0×10~(-4)g/mL.