Offshore discarded platform piles removal wire saw is in need to be fixed quickly before it works, this is a complex pose adjustment process, which requires the clamping device to complete. Wire saw clamping hydraulic cylinder with synchronization control will ensure the safe and stable of pose adjustment process. Pose adjustment dynamics model was obtained by analysis. Control system was designed by using twostep control approach, which included Quantitative Feedback Theory (QFT) control in the outer loop and perturbation observer theory in inner loop. The wire saw pose adjustment experiment was conducted. Experimental results show that the control system can ensure the hydraulic cylinder synchronization within the error range, so as to realize the pose adjustment project target, which provide a certain basis for the wire saw reliable and efficient work under water. 