HRZD-hydraulic fit-up assembling rotator is mainly used for fit-up assembling between cylinders, there are side pull type and upward peak type for choose. The side pull type adjusts the relative position between the cylinders by adjusting the center distance of the rollers, it is suitable for light cylinders, the upward peak type adjusts the relative position between the cylinders by adjusting the center height of the rollers, it is suitable for heavy cylinders. The roller can adopt steel glue combined roller, polyurethane roller and steel roller, the speed of the roller can be adjusted stepless by frequency conversion and controlled by cordless remote controller. It has the advantages of practicability, reliability, smooth rotation and convenient operation.