Disclosed are a nematicide containing a lactone ring, and a preparation method and a use thereof, where the nematicide comprises hydrogen, cyano, fluorine, chlorine, bromine, an alkyl containing 1 to 4 carbon atoms, an alkoxy containing 1 to 4 carbon atoms, alkoxyphenyl, an alkoxy containing 1 to 4 carbon atoms and a hydrogen atom on the carbon atom substituted by one or more chlorine atoms, an alkoxy containing 1 to 4 carbon atoms and a hydrogen atom on the carbon atom substituted by one or more fluorine atoms, nitro or amino； and R6 is selected from hydrogen, fluorine and chlorine. The invention has a good control effect on eggs and the second-stage juveniles of root-knot nematodes, and in particular can fully inhibit the hatching of cucumber, tomato, tobacco, soybean and other root-knot nematode eggs； during use over a long period of time, pests do not produce antibodies against the nematicide of the present invention, and same has a good nematicidal effect； also provided in the invention is a method for preparing the nematicide containing the lactone ring, wherein the preparation method has few steps and the process is easy to operate, and is suitable for large-scale industrial production.L'invention concerne un nématicide contenant un cycle lactone, son procédé de préparation et une de ses utilisations, le nématicide comprenant de l'hydrogène, du cyano, du fluor, du chlore, du brome, un alkyle contenant de 1 à 4 atomes de carbone, un alcoxy contenant de 1 à 4 atomes de carbone, un alcoxyphényle, un alcoxy contenant de 1 à 4 atomes de carbone et un atome d'hydrogène sur l'atome de carbone substitué par un ou plusieurs atomes de chlore, un alcoxy contenant de 1 à 4 atomes de carbone et un atome d'hydrogène sur l'atome de carbone substitué par un ou plusieurs atomes de fluor, groupes nitro ou amino ； et R6 est choisi parmi un atome d'hydrogène, de fluor et de chlore. L'invention a un bon effet de lutte sur les œufs et les juvéniles de second stade des nématodes à
