Floor support plate capable of being disassembled in sectional mode

The utility model relates to the technical field of building boards, in particular to a sectional type detachable floor support plate which comprises a main plate body. The floor support plate capable of being disassembled in the sectional mode is composed of the first main body frame, the second main body frame and the third main body frame, and the assembling plates on the two sides of the detachable frame are inserted into the assembling grooves in the middles of the assembling frames to be connected with the first connecting frame and the second connecting frame. Two limiting blocks arranged on the left side of the first connecting frame and the right side of the second connecting frame are inserted into limiting grooves formed in the corresponding positions of the assembling plate to limit vertical movement of the detachable frame, so that sectional type disassembly and assembly of the floor support plate can be achieved, the overall applicability is enhanced, and meanwhile later maintenance can be facil