The invention provides an extruding machine with a combined extruding shaft. The extruding machine comprises a workbench mounted at the bottom a machine frame. An extruding shaft body of a hollow structure is fixedly arranged on the upper side of the workbench. A mandril which moves up and down in the vertical direction and is used for extruding blanks for forming is arranged in the hollow structure of the extruding shaft. An extruding pad with a hollow hole channel matched with the outer diameter of the mandril is fixedly connected to the upper end of the extruding shaft body. A movable die mechanism used for being matched with the mandril to extrude the blanks for forming is arranged on the extruding pad. The extruding machine with the combined extruding shaft can effectively improve the working efficiency and reduce the cost.