The invention discloses an electromagnetic pulse forming device and forming method for a crimping cable intermediate joint connecting tube. The electromagnetic pulse forming device comprises an upperdisc-shaped coil (5) and a lower disc-shaped coil (6), a first groove (18) is formed in the bottom surface of the upper disc-shaped coil, a first blank area (19) without a winding coil is arranged inthe circle center position of the upper disc-shaped coil, a second groove (20) is formed in the top surface of the lower disc-shaped coil, a second blank area (21) without a winding coil is arranged in the circle center position of the lower disc-shaped coil, the upper disc-shaped coil (5) and the lower disc-shaped coil (6) are oppositely arranged, the first groove (18) and the second groove (20)are spliced into a containing groove (23) for containing the cable intermediate joint connecting tube (22), and the first blank area (19), the second blank area (21) and a cable intermediate joint connecting area (24) are aligned. When discharging, the opposite areas, by removing the first blank area and the second blank area, of the upper disc-shaped coil and the lower disc-shaped coil internallyform an equivalent circulation loop.