Wood board flattening device for woodwork carving machine and flattening method of wood board flattening device

The invention relates to a wood board flattening device for a woodwork carving machine and relates to the technical field of woodwork carving machines. By means of the wood board flattening device, the problem that the carving precision of a wood board is not high enough is solved. The wood board flattening device comprises a sliding seat and further comprises mounting seats. Each mounting seat set comprises the two corresponding mounting seats. A connecting shaft is arranged between each set of mounting seats. Connecting blocks are arranged at the outer circumferential side of each connectingshaft. A flattening barrel is connected to the outer circumferential side of each connecting block pair in a rotary manner. The flattening barrels are connected to the top of a wood board in a rolling manner. A locating pillar is arranged at one side of each corresponding connecting block. The side, away from the corresponding connecting block, of each locating pillar is fixed to the corresponding mounting seat. Each fla