The invention relates to the field of construction of concrete structure buildings, in particular to a support joint structure for rebar truss plates and a framework formwork. The structure comprisesa framework structure and the rebar truss plates located at the two sides of the framework structure, the framework formwork is arranged at the outer side of the framework structure and comprises twoside formwork bodies and a bottom formwork body, a floor support plate is arranged at one side of each side formwork body, and the heights of the upper ends of the side formwork bodies are equal to that of the upper surfaces of the floor support plates; the structure comprises a first supporting part for supporting the end of each rebar truss plate, and a supporting base is arranged at the end ofeach rebar truss and located above the corresponding first supporting part. Through connecting bars, the rebar truss plates at the two sides of the framework structure are connected, and the connecting bars are simple and convenient in connection and easy to operate; meanwhile, floor plates after setting of cast concrete have high connecting strength and bearing capability, through support of thefirst supporting parts, staggering of side portions of the rebar truss plates and side formwork bodies is small, and after forming, the joint parts of the floor plates are level.