The present invention relates to a flagstone processing method. To this end, the present invention comprises a raw stone extraction step of collecting raw stones from a mine; A square slat cutting step of transporting the collected gemstones to be loaded in the gemstone loading area, selecting the loaded gemstones, placing them on the top of the cart of the cutter, cutting them to have a certain width, and cutting them into the shape of a square slabstone; A dodrak flagstone processing step in which a dodrak is formed on an upper surface by a dodrak processing head in the process of placing the square flagstone on a conveyor belt and moving at a predetermined speed; A step of cutting a dodrak pillar stone having a column shape by placing the dodrak flagstone on which the dodrak is formed on the top of the cart of the cutter and cutting it to have a certain width; A dodrak stone cutting step of cutting the dodrak pillar stone with a hydraulic cutter to have a hexahedral shape; Dodrakseok roll processing step of colliding with each other in the process of rotating the dodrakseok cut into the hexahedron and rounded corners of the drum; And a dodrakseok drying step in which dodrakseok is taken out from the drum and washed and dried. Accordingly, the present invention allows the price to be lowered while increasing the productivity per unit time, and it is possible to obtain a high-quality dodrak stone used for roll slats, stone blocks, roadways, and sidewalk blocks.
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