Abstract: A new method based on multi-objective fuzzy linear optimization algorithm for fleet assignment problem was proposed. The method applied fuzzy theory to optimization concept, turning the fuzzy multi-objective optimization mathematical model with the objective of the balance of aircraft flight time, the balance of the numbers of the aircraft movemenu and least waiting time first to a linear programming problem according to the maximum degree of membership.The result of the experiment shows the method can rapidly get the desired results.Multi-objective optimization,

Key words: Fuzzy theory, Maximum degree of membership, Fleet assignment, Linear programmmg