The invention relates to a double-chamber high-temperature forging and forming device of a TiAl intermetallic compound forge piece and a method thereof, belonging to forming methods and devices of TiAl intermetallic compound forge pieces. The invention solves the problems of large heat loss, large deformation resistance, small forging deformation, difficult forging and the like generated when thetraditional forging technology is used for forging the TiAl intermetallic compound forge piece. A blank heating chamber and a mould heating chamber are adjacently arranged and a movable baffle plate is arranged between the blank heating chamber and the mould heating chamber, and a hearth of the blank heating chamber and a hearth of the mould heating chamber are mutually penetrated and mutually independent by pulling the movable baffle plate up and down. TiAl blanks and a mould are heated to 1230-1300 DEG C and 800-1000 DEG C respectively in different heating chambers; the movable baffle plateis opened to push the TiAl blanks into the mould heating chamber along a carrying platform and put the TiAl blands into a mould cavity; and the mould is closed for forging. The invention is used for high-temperature forging and forming of TiAl intermetallic compound materials.