In order to study the inflection of canard and strake on the aerodynamic characteristics of configuration with forward-swept wing(FSW), longitudinal aerodynamic characteristics of configuration with forward-swept wing(FSW) installing canards、strakes and canard strake combination are calculated by using three dimension N-S equations, and then the vortex mechanism is analyzed by streamlines display. The results indicate that all three models can enhance the lift-drag characteristics of FSW. After installing canard , the separated region of the wing upper-surface is diminished by the downwash effect of canard vortex and it can control the flow on the wing surface effectively. The maximal lift of the airfoil is increased about 40%. Flow separation at the root of FSW was interfered and deferred by the strake vortex after installing strake and it also produces vortex lift The lift-drag characteristics is better than primordial wing. After installing canard strake combination, canard vortex and strake vortex induces mutually, and enhance the control ability to the flow on the wing surface. The maximal lift of the airfoil is increased about 3% than installing canard; the aerodynamic characteristics are remarkably improved.