The invention provides a construction method for an assembly tool type truss superimposed plate. The construction method comprises the steps that shear resistance steel bar supports, supporting vertical rods, truss supporting beams and a bottom plate are fabricated in sequence; connection combination of the shear resistance steel bar supports, the supporting vertical rods and the truss supportingbeams is performed; truss supporting beam combination parts are paved on vertical and horizontal steel bars; prestressed superimposed plate concrete pouring is performed; prestressed superimposed plate installation is performed; a second layer of superimposed concrete is poured; and the truss supporting beams are disassembled. The assembly tool type truss superimposed plate further comprises the shear resistance steel bar supports, the supporting vertical rods, the truss supporting beams and the bottom plate, the bottoms of the shear resistance steel bar supports of the assembly tool type truss superimposed plate are provided with the bottom plate, the bottom plate is provided with vertical and horizontal bottom bars, the bottom bars in the long edge direction are prestressed bars, the bottom bars in the short edge direction are nonprestressed bars, and the shear resistance steel bar supports are in bound connection with the vertical and horizontal bottom bars.