The present invention disclosed novel phenylamidine compounds of formula (I),Formula (I)wherein, Cy, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10and m have the same meanings as defined in the description.The present invention further discloses a process for preparation of compounds of formula (I). Furthermore, the present invention discloses the use of compounds of formula (I) and/or composition thereof to protect agricultural crops and/or horticultural crops against undesired phytopathogenic microorganisms.本發明公開了新的式(I)的苯基脒化合物,其中,Cy、R1、R2、R3、R4、R5、R6、R7、R8、R9、R10和m如描述中所定義。本發明還公開了製備式(I)化合物的方法。此外,本發明公開了式(I)化合物和/或其組合物用於保護農作物和/或園藝作物免受不想要的植物病原微生物的用途。