Paper holder convenient to stack and fix

The utility model discloses a paper holder convenient to stack and fix, which comprises a paper holder main body, four reinforcing columns are fixedly arranged in the paper holder main body, a same central block is fixedly arranged among the four reinforcing columns, through holes are arranged between the corresponding reinforcing columns and the central block, a first mounting groove is arranged at the top of the central block, and a second mounting groove is arranged at the bottom of the central block. A sliding rod is fixedly installed on the inner wall of the bottom of the center block, a movable plate is slidably connected to the sliding rod in a sleeving mode, extrusion pieces are fixedly installed on the two sides of the movable plate, a rotating wheel is rotationally installed at the bottom of the movable plate, movable holes are formed in the two sides of the center block, and transverse rods are movably installed in the two movable holes. The paper support convenient to stack and fix is simple in st