Abstract: The metallographic microstructure, microhardness and macro-mechanical properties of reactor pressure vessel（RPV） steel produced by two Chinese manufacturing plants（plant A and plant B） were compared and analyzed, and the experimental results were compared with the requirements of RCC-M2000 +2002（addendum）. The results show that the microstructure of the RPV steel produced by plant A consists of bainite ferrite and island structure, while relatively large amounts of ploygonal ferrites appear in RPV steel produced by plant B. According to preliminary analysis, this is caused by the low cooling rate during quenching process, which should be avoided and improved in the manufacturing process. At the same time, the RPV steel produced by plant A has relatively high impurity elements and thus plant A should focus on improving ingot smelting process. However, the chemical composition and mechanical properties of RPV steel produced by plant A and plant B all meet the requirements of RCC-M2000+2002（addendum） and the performance requirements of RPV engineering applications. Therefore, it proves that the domestic RPV manufacturing level can meet the development requirements of China’s nuclear power industry.