Abstract: Due to the high critical transition temperature and the high current-carrying capacity, YBCO high temperature superconducting strips attract researchers’ extensive attention in areas of technology development and application. But the mechanical problem such as 'edge debonding' occurs in the application of YBCO strips and threatens the strips’ development seriously. So the electromagnetic mechanical response of superconducting tape after local debonding at the edge is studied. By considering that the structure is placed in an external magnetic field whose direction is perpendicular to the surface of the strip, the stress control equation is obtained base on the plane strain method, and the normal stress in the superconducting thin films as well as the shear stress on the interface is calculated by solving the Chebyshev series numerically. Results show that the normal stress in the superconducting film and the shear stress on the substrate interface are symmetrically distributed in the non debonding region under the applied magnetic field, and the stress concentration occurs in the edge debonding region. The strip edge debonding width has obvious effect on the normal stress, and an increasing debonding width leads to the increase of the normal stress, which will further aggravate the debonding edge. The hardness of the substrate has also significant effect on the distributions of both normal stress in the film and the shear stress on the interface. A harder substrate material has a stronger constraint on the superconducting film, which can effectively reduce the normal stress in the film. The research results should provide a theoretical basis for the research of high temperature superconducting tape and its application.