The present invention relates to fungicidal N-cycloalkyl-N-[(heterocyclylphenyl)methylene] carboxamide derivatives and their thiocarbonyl derivatives, their process of preparation and intermediate compounds for their preparation, their use as fungicides, particularly in the form of fungicidal compositions and methods for the control of phytopathogenic fungi of plants using these compounds or their compositions.本發明係關於殺真菌N-環烷基-N-[(雜環基苯基)亞甲基]甲醯胺衍生物及其硫羰基衍生物、其製備方法及其製備之中間化合物,其作為殺真菌劑(尤其呈殺真菌組合物形式)之用途,及使用此等化合物或其組合物控制植物之植物病原性真菌的方法。