With the numerous catastrophic incidences of progressive collapse in the past, there has been increasing interest from both engineering and academic communities toward evaluating the ability of reinforced concrete (RC) structures to resist progressive collapse. Progressive collapse of structures under earthquake and explosion problems induced a major threat to people's life and property. It is a hot direction in the research of civil engineering. The majority has focused on scenarios in which a single vertical loading bearing member, such as a column, is removes. This paper adopted the same method. In order to improve the integrity of structures with prestressed concrete hollow core slabs and to prevent vertical support member failure or progressive collapse, the joint between slabs were studied in this paper, this study aims to assess the effects of vertical support removal on the overall performance and load resisting mechanisms of RC structures. In this paper, two prestressed hollow-core slabs are studies with the condition of concentrated loading by two points symmetrically, specimens is jointed by two short prestressed hollow-core slabs, then cast-in-place concrete grouted. Joints have two types, transverse direction by butte connection with U-shaped tendons and out of prestressed reinforcement, longitudinal direction by tie connection with planting bar and out of prestressed reinforcement. All specimens have the same span of calculation. This article used the quartile static loading method to research the new type of continuous slab prefabricated. In the process of loading suddenly dismantle intermediate support. The test results collected included failure modes, load resisting capacities, deformation capacities, strain gauge results, vertical movement of support. The suspension mechanism was analyzed during mechanical process of specimen. Finally the author comes to the conclusion that the arrangement of side beam and plate joints is reasonable,Appropriate peripheral and transverse joints in new type of prefabricated floor can achieve ideal collapse resistance。