The utility model relates to the field of shooting distance experiments, and discloses a shooting distance experiment support which comprises a base, the top end of the base is fixedly connected with a supporting rod, the outer wall of the supporting rod is slidably connected with a movable plate, the top end of the movable plate is hinged to a clamping plate through a hinge rod, and the top end of the supporting rod is fixedly connected with a connecting base. A fixing
pipe is fixedly connected to the bottom end of the connecting base, a threaded sleeve is movably connected to the outer wall of the fixing
pipe, a positioning mechanism is arranged on the inner wall of the threaded sleeve, and a connecting
assembly is arranged on the side wall of the left end of the connecting base. According to the gun fixing device, the threaded sleeve can be rapidly moved to drive the movable plate, the hinge rod and the clamping plate to be close to fix a gun, accurate fixing is conducted through the threaded arrangement of the threaded sleeve and the movable plate, the fixing stability of the gun is guaranteed, the situation that the angle of the gun deviates is avoided, and the accuracy of experimental data is improved to a certain degree.