Method for preparing explosive composite rod based on water pressure in local vacuum environment

The invention provides a method for preparing an explosive composite rod based on water pressure in a local vacuum environment. The method comprises the steps that a to-be-composited rod, a to-be-composited pipe, a small-size pvc pipe and a large-size pvc pipe are coaxially arranged from inside to outside; the two ends of a gap between the to-be-composited rod and the to-be-composited pipe are sealed by sealing strips, vacuumizing is carried out, and a vacuum gap environment is constructed; space between the small-size pvc pipe and the large-size pvc pipe is filled with an explosive and a detonator to form an explosive device; space between the to-be-composited pipe and the explosive device is filled with water, and a water environment is constructed; and the explosive device is detonated to enable the to-be-composited pipe and the to-be-composited rod to be welded and combined, and the high-quality explosive composite rod is obtained. According to the method for preparing the explosive composite rod based on