Sawmilling device capable of straightening

The invention relates to a sawmilling device capable of straightening. The sawmilling device capable of straightening comprises stand columns (1), and is characterized in that connection blocks (6) are fixed to the upper end parts of the stand columns (1); through holes are formed in four faces of the connection blocks (6); a cross beam (2) and a longitudinal beam (3) are vertically fixed onto each same connection block (6); the two cross beams (2) and the two longitudinal beams (3) jointly form a rectangular framework; a platform (5) is arranged on the upper ends of the connection blocks (6); and bulges on the upper ends of the connection blocks (6) are inserted into grooves formed in the bottom parts of the platform (5); a side face fixing seat (8) is fixed to the outer side of each longitudinal beam (3); and an infrared collimator (9) is arranged on the side face fixing seat (8). The sawmilling device capable of straightening provided by the invention is reasonable in structure, all parts can be disassembl