A magnetic pulse asymmetric magnetic collection device for a special-shaped pipe fitting belongs to the tooling design field of special type welding. The magnetic pulse asymmetric magnetic collection device for the special-shaped pipe fitting is characterized in that the shape of the special-shaped is a whole which is formed by connecting a cylindrical pipe fitting with an umbrella-shaped structure; the magnetic pulse asymmetric magnetic collection device utilizes a cylinder as an original material, a small cylinder is formed on one side of the cylinder, a truncated cone is formed on the other side of the cylinder, and the bottom surface of the small cylinder is the upper bottom surface of the truncated cone; the small cylinder, the truncated cone and the cylinder as the original material are coaxial; and the cylinder is also provided with a guide groove which is formed by cutting through the cylinder from the outer surface to the axis in the axial direction of the cylinder. By means of the energy conversion fundamental principle during a magnetic pulse welding process, the magnetic pulse welding process can be completed instantly, energy can be precisely controlled, and good repeatability is obtained, so that mechanization and automation can be achieved easily. Welding pieces with good quality can be obtained and environmental friendliness is achieved.