Abstract: In this paper,a crack opening function with rectangular shape along the y-axis is formed by the imagined part of complex function, and then the crack tip is transformed into a smoothed shape by the weight integral method; secondly, the saness functions of thin elastic plate with multi-cracks along the illterface(the y-hos) between two dissimilar mat6rials are deduced, It is demonstrated in a diagram that the shes singular poied is removed into other branch, while the stress distribution is finite and continuous in the whole xy plane, An intermediate zone near the crack tip is formed in which both the crack opening displacement and the cross-sechonal force appear, removing the oscillating phenomenon of infinite stress near the crack tip.