The invention discloses a multi-head milling machine tool, which comprises a base, a slippage working table and a cutter fixing cross beam. The slippage working table is arranged on the base, and comprises a horizontal sliding table, X-axis slideways, a plurality of steel wire ropes, and multiple groups of steel wire rope fixing parts; each steel wire rope is fixed onto the horizontal sliding table through at least two groups of steel wire rope fixing parts; the X-axis slideways are arranged on two sides of the horizontal sliding table; the horizontal sliding table can move through the X-axis slideways; the cutter fixing cross beam is fixedly arranged on the base, is located above the slippage working table, and comprises multiple cutter bit fixtures, multiple cutter bits and Y-axis slideways; the multiple cutter bit fixtures are in slip connection with the cutter fixing cross beam through the Y-axis slideways; the multiple cutter bits are arranged on the multiple cutter bit fixtures; a Z-axis slideway is arranged on each cutter bit fixture; and each cutter bit is in slip conection with the corresponding cutter bit fixture through the corresponding Z-axis slideway.