Two-line integrated hard machining center machine adopts the structure of fixed column type and a cross slide structure. The Y-axis with four-guide rail design to ensure heavy load capacity and accuracy during processing. A high-rigidity and high-torque spindle, the front end with a labyrinth design, an air curtain protection function and a circulating cooling device, more stable temperature, less thermal deformation, and higher accuracy; Rear flushing chip removal with a built-in double screw conveyor, and rear water tank design, automated and efficient. The labyrinth water tank filtration system structure, good cutting fluid for workpiece processing; The high-speed tool changing design, combined with pre-sensing control and high-efficiency tool cutting system, fast tool changing speed; The combination of the X/Y axes high speed of linear rail and the Z axis high rigidity of hard rail, suitable for processing different material of various types of small and medium-sized batches of complex parts such as medium and large boxes, plates, disks, valves, shells, molds, etc. and widely used in precision parts, hardware, auto parts, and medical equipment industries.