The invention discloses a combined double-action martial arts sword, which includes a sword body, a scabbard and a handle. The sword body includes a fixed sword body and a movable sword body. The sheath is movably connected, the handle includes an outer sleeve and an inner sleeve, the inner sleeve is provided with a retaining ring, the inner sleeve is provided with a chain, the chain is connected with the hand guard, and the outer side of the inner sleeve is provided with a movable A support rod is arranged inside the fixed sword body, a third chute matching with the support rod is arranged on the movable sword body, a cross bar is arranged inside the third chute, and a first cross bar is arranged on the cross bar. A bump and a second bump, a movable stopper is set in the fixed sword body, a first connecting rod is arranged between the movable stoppers, and a second connecting rod is arranged on the first connecting rod. The beneficial effect of the invention is that the sword body can be stretched, which is convenient for the user to carry, and can also be used as a nunchaku, preventing the user from being bored when practicing the sword for a long time.