Daoula, Chaima2021-09-052021-09-052021http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/25328In this memory, we have studied some de nitions and properties of the fuzzy lattice and we have seen some types of fuzzy lters and fuzzy ideals in a fuzzy lattice. we noticed that the fuzzy lattice isomorphism preserves the nature and type of fuzzy lters ( fuzzy ideals).enFuzzy sets, fuzzy lters, fuzzy ideals, fuzzy lattice isomorphism.Thesis