A set of three specimens with different forms of reinforcement are producted, one is with the common concrete, the other two are mixed with the PVA fiber. All have the same span-to-depth ratio of 1.2. Failure modes，ductility performance，bearing capacity and energy dissipation capacity are analyzed. The results show that the mix of PVA fiber postpones the cracking of the specimen, improves the spall state of the coupling beam and increases the ultimate load. Cross diagonal reinforcement can effectively restrict the occurrence and development of the diagonal shear crack, also improve the ductility and energy dissipation capacity.

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