The present invention relates to N-acylimino compounds of formula (I) Wherein X is O or S, especially O； m is an integer selected from 0, 1, 2, 3, 4, 5 or 6； Het is a 5 or 6 membered carbon-bonded or nitrogen-bonded heterocyclic ring, W 1 -W 2 -W 3 -W 4 represent a carbon chain group connected to N and C = N to form a saturated, unsaturated, or partially unsaturated 5 or 6 membered nitrogen containing heterocycle, wherein W 1 , W 2 , W 3 and W 4 each independently represent CR v R w , R 1 and R 2 may be hydrogen, halogen, etc., R 3 can be hydrogen, halogen, CN, C 1 -C 6 -alkyl and the like, R 4a and R 4b can be hydrogen, halogen, C 1 -C 6 -alkyl and the like, R 5 is selected from the group consisting of hydrogen, halogen, C 1 -C 6 -alkyl, C 1 -C 6 -alkenyl, C 1 -C 6 -alkynyl, C 3 -C 8 -cycloalkyl, S (O) n NR 9a R 9b, NR 9a R 9b, C (= O) OR 8, C (= O) NR 9a R 9b, C (= S) NR 9a R 9b, C (= O) R 7a, C (= S) R 7a , NR 9a -C (= O) R 7a, NR 9a -C (= S) R 7a, NR 9a -S (O) n R 8a, Q- moieties phenyl (wherein the phenyl ring is one or more, for example 1, 2, 3, 4, or optionally substituted with five identical or different substituents R 10), or Het-Q moiety may be a #, or R 3 and R 5 taken together with the carbon atoms to which they are attached can also form a 3, 4, 5 or 6 membered saturated partially unsaturated carbocycle or a heterocycle. The present invention also relates to the use of N-acyliminoheterocyclic compounds, stereoisomers, tautomers thereof and salts thereof, for preventing invertebrate pests. Furthermore, the present invention also relates to a method for preventing invertebrate pests, which comprises applying such a compound.본 발명은 화학식 (I) 의 N-아실이미노 화합물에 관한 것이다:[식 중, X 는 O 또는 S, 특히 O 이고；m은 0, 1, 2, 3, 4, 5 또는 6 으로부터 선택되는 정수이고；Het은 5 또는 6 원 탄소-결합 또는 질소-결합 헤테로시클릭 고리이고,W1-W2-W3-W4는 N 및 C=N 에 연결되어, 포화, 불포화, 또는 부분 불포화 5 또는 6 원 질소 함유 헤테로사이클을 형성하는 탄소쇄 기를 나타내고, 여기서 W1, W2, W3 및 W4 는 각각 개별적으로 CRvRw 를 나타내고,R1, R2는 수소, 할로겐 등일 수 있고,R3은 수소, 할로겐
