Abstract: In order to solve the problem of non-uniform axial deformation of traditional coil tube by electromagnetic bulging, a new electromagnetic bulging method of coil tube is proposed in this paper. Firstly, the two-dimensional axisymmetric electromagnetic-structure coupling model of tube electromagnetic bulging is constructed in COMSOL software, and the new coil is compared with the traditional coil from three aspects of axial magnetic flux density, radial electromagnetic force and deformation profile. The results show that the coil can provide the concave distribution of radial electromagnetic force for the pipe, that is, a large radial electromagnetic force is applied at the end of the pipe, and the electromagnetic force in the middle meets the demand of pipe bulging, so that the uniformity of axial deformation is increased by 2.3 times. Obviously, this method can effectively overcome the problem of non-uniform axial deformation in traditional tube electromagnetic bulging, and promote the application of electromagnetic forming technology in industry.