Double-machine linkage CNC hydraulic press brake machine is a kind of large-scale CNC tandem press brake machine that adopts electro-hydraulic synchronization technology, cooperates with proportional valve, grating ruler, double-machine linkage technology, etc., and servo-controls the back gauge. The double-machine linkage CNC hydraulic bending machine can work at the same time, and can also be used alone to improve production efficiency, and is equipped with a deflection compensation mechanism. It has high synchronization precision, the whole machine frame adopts all-steel welding structure, has sufficient strength and rigidity, works smoothly, is safe and reliable, and is easy to operate, and can bend large and special workpieces.