The invention relates to the technical field of floors, in particular to a novel high-speed railway carriage floor. The carriage floor includes a floor layer, the lower surface of the floor layer is boned with a number of uniformly spaced flame retardant layers, and a gap is left between every two adjacent flame retardant layers; heat insulation layers are fixedly bonded on the lower surfaces of the flame retardant layers, water insulation layers are bonded on the lower surfaces of the heat insulation layers, and a number of uniformly spaced compression fiber board layers are fixedly boned onthe lower surfaces of the water insulation layers. There are limiting structures between the compression fiber board layers and the water insulation layers. Finger joint laminated boards are fixedly bonded on the lower surfaces of the compression fiber board layers, and there is stability maintaining structures between the finger joint laminated boards and the compression fiber board layer. The arrangement of the floor layer, the flame retardant layers and water insulation layers in the novel high-speed railway carriage floor can ensure the flame-retardant and waterproof efficiency of the floor, and moreover, triangular stability maintaining blocks and supporting nails can ensure that the floor has strong stability and stress resistance.