The invention discloses an outer bore gun fixing device for
artillery direct-aiming shooting training, which comprises a
gun barrel, a front fixing frame, a rear fixing frame and an outer bore gun, the front fixing frame and the rear fixing frame are provided with the same guide seat, a gun stock limiting seat and a
gun barrel support are slidably arranged in the guide seat, the gun stock limiting seat and the
gun barrel support are provided with the same outer bore gun, and the gun
barrel is provided with the gun stock limiting seat and the gun
barrel support. Limiting assemblies are arranged at the side ends, away from each other, of the gun stock limiting base and the gun
barrel support in the guide base correspondingly, and the two limiting assemblies limit the positions of the gun stock limiting base and the gun barrel support correspondingly. The same guide base is installed on the front fixing frame and the rear fixing frame, the gunstock limiting base and the gun barrel support are slidably installed in the guide base, the positions of the gunstock limiting base and the gun barrel support can be limited through the paired limiting assemblies correspondingly, it is guaranteed that the gunstock limiting base and the gun barrel support in the guide base are transversely and coaxially arranged, manual alignment is avoided, and the working efficiency is improved. In addition, the distance between the gun stock limiting seat and the gun barrel support can be flexibly adjusted so as to meet the requirement for fixed use of outer bore guns of various lengths and models.