Belt cutting saw

The utility model discloses a belt cutting saw which comprises a cutting saw body and a base, an installation disc is rotationally connected to the base, a crank arm is rotationally connected to the installation disc, the cutting saw body is hinged to the crank arm, the opposite positions of the left side and the right side of the base extend outwards to form a supporting table, and one or more extending tables are detachably connected to the supporting table. The extension tables can be connected with each other and can also be installed on the supporting part. According to the scheme, the detachable extension tables are arranged on the two sides of the base and used for supporting a workpiece, the extension tables are convenient to mount and dismount, the mounting mode can be combined at will according to needs, and the extended supporting length can also be adjusted according to needs; the clamping mechanism is arranged on the supporting table, so that enough space is provided for folding of the body part;