This machine is a specialized equipment for automatic balancing and weight removal of dual station crankshafts. After corresponding adjustments, it can be used for automatic balancing and calibration of large crankshafts in three cylinder, four cylinder, and six cylinder (length less than or equal to 800). The machine consists of a crankshaft balancing machine system, a two coordinate CNC precision high-speed drilling and weight removal system, a workpiece drilling and weight removal axial positioning and circumferential positioning system, a rotating dual arm gripper manipulator system, a balance detection and drilling clamping device, a tool alignment system, a servo motor and control system, a CNC numerical control system and computer measurement and control system, a micro lubrication and drilling high-speed oil mist and pneumatic composite internal cooling system, a mist suction device, a pneumatic cleaning device, a dust suction and chip removal device, a fully enclosed safety protection device, etc. In order to highlight the concept of environmental protection, this machine adopts a new technology of micro lubrication and high-speed oil mist and pneumatic composite internal cooling system, which greatly improves the lubrication of workpiece rotation and the cooling quality of high-speed drilling.