The folding wing has a dynamic unfolding process during aircraft&store separa-tion,which will cause an evident change in aerodynamic characteristics of the store and further result in difficulty of acquiring the correct separation characteristics of the store by using the con-ventional CTS WTT (Captive Trajectory Simulation Wind Tunnel Test).Therefore,a new test technique is put forward for CTS WTT of store with folding wing,and emphasizes on obtaining aerodynamic data of stores at wings spreading during aircraft&store separation.The technical difficulty involved in this research is to establish the simulation method for the dynamic unfolding process of the folding wing,and its key point is the formation principle for the aerodynamic force of the store,That is both under the aircraft disturbance flow condition with the same location and same attitude angle.The store’s aerodynamic force when the wing is unfolded is the aerodynamic force when the wing is folded added with the aerodynamic difference of free flow between the un-folding and folding statuses of the wing.The whole testing method and procedure are introduced, and details in the procedures of the ground bench test,the establishment of parameter database for the unfolding status of the folding wing,the establishment of aerodynamic database for differ-ent statuses of the folding wing,and the aerodynamic coefficient corrective calculation of trajecto-ry calculation in relevant tests were presented.Then the technique was validated with the folding wing weapon on some light fighter.