In order to investigate mechanical performance of corrugated steel composite bridge decks, three groups with 9 specimens were designed and tested based on the push-out tests, and the failure pa-ttern, ultimate load and slip were analyzed. Then the finite element models were established and the deflection, interface slippage, corrugated steel plate stress and its distribution, shear connector stress and its distribution were analyzed under the concentrated load of the middle-span of the corrugated steel compo-site bridge deck. The results show that the failure of perfobond (PBL) shear connectors are divided into three stages: elastic stage, plastic stage and failure stage. The specimens are failed by concrete shear fai-lure and showed good ductility when failure occurred. The transversal reinforcement and bonding friction have an important effect on the bearing capacity and slippage of shear connectors. The ultimate bearing capacity of the 5 m span steel-concrete composite bridge deck is 630 kN. The bridge deck undergoes four stages under load: elastic stage, crack development stage, yield stage and failure stage. PBL shear connectors can effectively combine the two structures together, and the yield areas of corrugated steel plates and shear connectors are concentrated in the mid span, with the valley region being the most obvious.