Rapid positioning tool and positioning method

The invention provides a quick positioning tool which comprises two left clamping arms arranged front and back and two right clamping arms arranged front and back, the left clamping arms and the right clamping arms are oppositely arranged, and the opposite ends of the left clamping arms and the right clamping arms clamp two pipes from the two sides in the opposite directions so as to prevent the two pipes from sliding up and down. The left clamping arm and the right clamping arm fix two pipes inwards from the two sides, and the pipes are limited to move up and down and outwards. The clamping mechanism is used for clamping the two pipes downwards from the upper side so as to prevent the two pipes from sliding in opposite directions. The upper side of the clamping mechanism is fixed to limit inward movement of the two pipes. The positioning method of the rapid positioning tool for the round tube profile piece in the trial-manufacturing process comprises the following steps of installing the left clamping arm, i