A compound saw, comprising a base , a housing having an internal chamber , a cutter head disposed inside the chamber , a transmission component and a table ; wherein the housing has a front end and a rear end, the rear end of the housing is rotatably connected to the base , the front end of the housing is vertically movable relative to the base , so as to provide a cutting region below or above the housing ; the housing has a first cutting slit at a bottom of the housing for the cutter head to pass through; the transmission component is installed on a lateral surface of the housing , and connected to the cutter head ; the table is disposed above the housing as a work platform, the table is connected to the cutter head through the transmission component , and the table has a second cutting slit at a top of the table for the cutter head to pass through; the table has a front end and a rear end, the rear end of the table is rotatably connected to the housing , and the compound saw operates in a miter mode where the front end of the table moves upward relative to the housing , so as to expose the cutter head out of the first cutting slit ; the compound saw operates in a platform mode where the front end of the table moves downward relative to the housing , so as to expose the cutter head out of the second cutting slit ; characterized in that the transmission component comprises a connecting rod having a first end and a second end, and a slide seat having a front end, a rear end, a middle portion and a rear portion which both are rotatably connected to the housing , the slide seat rotates in parallel to the housing ; the first end of the connecting rod is hinged to the table , the second end of the connecting rod is hinged to the rear end of the slide seat , and the front end of the slide seat is a free end. wherein the housing has a front end and a rear end, the rear end of the housing is rotatably connected to the base , the front end of the housing is vertically movable relative to the base , so as to provide a cutting region below or above the housing ; the housing has a first cutting slit at a bottom of the housing for the cutter head to pass through; the transmission component is installed on a lateral surface of the housing , and connected to the cutter head ; the table is disposed above the housing as a work platform, the table is connected to the cutter head through the transmission component , and the table has a second cutting slit at a top of the table for the cutter head to pass through; the table has a front end and a rear end, the rear end of the table is rotatably connected to the housing , and the compound saw operates in a miter mode where the front end of the table moves upward relative to the housing , so as to expose the cutter head out of the first cutting slit ; the compound saw operates in a platform mode where the front end of the table moves downward relative to the housing , so as to expose the cutter head out of the second cutting slit ; characterized in that the transmission component comprises a connecting rod having a first end and a second end, and a slide seat having a front end, a rear end, a middle portion and a rear portion which both are rotatably connected to the housing , the slide seat rotates in parallel to the housing ; the first end of the connecting rod is hinged to the table , the second end of the connecting rod is hinged to the rear end of the slide seat , and the front end of the slide seat is a free end. <EOS>