Test detection tool of torsion spring for weapon

The invention discloses a test detection tool of a torsion spring for a weapon. The tool comprises an upper tool, a positioning light bar, a positioning column and a lower tool that are arranged axially. A thread blind hole is formed in one end of each of the upper tool and the lower tool; and connecting grooves are formed in the middle parts of the upper tool and the lower tool; connecting segments matching the thread blind holes are arranged at ends of the positioning light bar and the poisoning column; and outer threads are formed at the outer circumference surfaces of the connecting segments. A coaxial blind hole is formed in the other end of the poisoning column. The positioning light bar and the upper tool are in threaded connection and are fixed by a nut; and the positioning columnand the lower tool are in threaded connection and are fixed by a nut. The positioning light bar is arranged above the positioning column; and a to-be-tested torsion spring is pressed into the blind hole of the positioning col