The airline gets revenue while their aircraft are flying. there are many things that influence the plane on the ground, for example: the time needed for passengers to get off the plane, baggage loading and unloading, fueling, boarding time mixed intager non linear programming is used for generating boarding model. promodel is used for simulating and the results are tim and sum of seat and asile interferences. airbus-320 is used to apply this smulation model. some of things that affect the boarding strategy model are the number of rows, number of groups and number of passengers that included for each group. the simulation result show that 6 group boarding nodel reducing 57,1% for interferences and 6,82% for boarding time over traditional pure back to front boarding model.