Abstract: With the continuity conditions of stress and displacement on materialinterface, complex potentials solutions for a bi-material infinite platewith an elliptical inclusion under uniaxial tension are given. The stressfield of a bi-material infinite plate with an elliptical inclusion and asemi-infinite interface crack are given on the base of the complexpotentials solutions obtained above. And the corresponding stress intensityfactor K is given. The influences of the position, the shape,material property, and different material combinations of inclusion on the stressintensity factor K are calculated. The results indicate that the distance ofinclusion from crack tip and the property of inclusion have remarkableinfluence on the stress intensity factor K, and these influences vary notablywith different material combinations, whereas the shape of inclusion haslittle influence on K. When the inclusion is soft, the shield effect isoccurred for K; conversely, it is inverse shield.