Steel fiber reinforced green concrete was applied to the composite slab in order to promote the application of green ecological materials in the composite slab. The flexural behavior of the steel fiber reinforced green concrete composite slab with different structural forms were studied. Full-scale comparative test of six steel fiber reinforced green concrete composite slabs and two ordinary concrete composite slabs were carried out. The characteristic parameters, such as failure mode, load-deflection curves, load-rebar strain curves, and load-concrete strain curves, were obtained. Further, the failure mechanism, deformation characteristics, and crack distribution were comparatively analyzed. The results show that the flexural processes of eight specimens are similar, which experienced elastic stage, elastic-plastic stage and failure stage. All specimens are bonded well on the connection interface，without any break-off and other phenomenon but with good cooperative work performance. Meanwhile, different structure forms of prefabricated base slabs have significant influence on the flexural behavior of the composite slab. It is noted that steel bar truss with ribs improves the flexural behavior of the composite slab significantly. In addition, the cracking strength and ultimate load-carrying capacity of the composite slab were affected by the effects of different structural forms and different material on flexural behaviour of prefabricated base slab.