Abstract: The crack in strip is often used in fracture mechanics as research model. There is a magnetoelectroelastic elastomer which contains infinite collinear cracks, when crack surface on the left side near crack tip is under the electromagnetic force load and anti-plane shear stress along the crack surface, elastomer tends to produce dynamic fracture. By using arch transform formula of complex variable function method, the analytic solutions of the dynamic stress intensity factors and the mechanical strain energy release rate were presented with the boundary conditions that the surface of the crack was electrically and magnetically impermeable. When the movement velocity tends to zero, the analytic solutions is degraded to stationary state solution. Through numerical example, the fracture mechanism was analyzed, the influence of the geometry size of strip and crack, external force, electric field and magnetic field on energy release rate respectively under static state were discussed to help the design and manufacture of related devices.