The invention relates to treatment instruments, in particular to an interventional treatment instrument made from a composite material and used for treating cerebral aneurysm embolism. Bead-like diamond spring coils of the treatment instrument can be coiled to form a space structure conforming to the arterial aneurysm through connecting points of diamonds and plays an arterial aneurysm stuffing role, meanwhile PU nanometer electrically-spun wires between the diamond spring coils can isolate blood flows, promote thrombosis in the arterial aneurysm and achieve arterial aneurysm closing purpose. The effective areas of the spring coils re increased through diamond support frameworks made of nickel-titanium memory alloy composite wires, and the embolism effect of the arterial aneurysm is improved. The PU nanometer electrically-spun wires among the diamond support frameworks are mixed with blood to form membranous substance, the arterial aneurysm can be closed, and thrombosis can be promoted. The using efficiency of the spring coils is improved, and the embolism effect is strengthened.