Abstract: Described is the technology research status of the multi cross roll high-precise pipe straightening machine in China, which is mainly reflected in such aspects as the improvement of straightening process, addition of straightening procedure, new-style arrangement of rolls and optimization of equipment structure. As for the high-precise straightening technology there are some differences between researchers in the roll design of a straightening machine and some systematic theoretic study is still insufficient on the high-precise straightening technology. Therefore it is recommended that CAD/CAM mode is used for the study of the high-precise straightening technology.