The design of slat system is a multi-target and multidisciplinary problem. In response to this complex issue, firstly difficult points in the design of the support and driving mechanism of leading edge slats are solved. Then by using the secondary development of CATIA, a set of aero-mechanism integrated design platform is established, which organically combines the leading edge slats aerodynamic design with the mechanism design. The function of this platform is to provide users with the inputs of the leading edge slats design parameters as well as support and drive mechanism design parameters, hereafter drive CATIA automatically generate leading slats and their takeoff/ landing configurations, on this basis automatically generate the support and drive mechanism parts, and then finish the assembly and simulation, Finally by using efficient aerodynamic evaluation measures to judge whether the takeoff/ landing performance of leading edge slats under the guidance of the mechanism meet the requirements of the overall design.