Abstract: The research progress of high strength non-oriented electrical steels at home and abroad is summarized according to related patents brought into the public by Baosteel, Nippon Steel & Sumitomo Metal corporation and JFE corporation. The characteristics of chemical composition, production technology and properties of products in the patents are analyzed. Each of solution strengthening method, fine-grain strengthening method, precipitation strengthening method or dislocations strengthening method may be used to improve the strength of non-oriented electrical steels. The advantages and disadvantages of the four strengthening methods are stated, too. During the research process, people should firstly make sure the target properties of a high strength non-oriented electrical steel according to its specific uses, and then determine to use a right strengthening method to achieve the balance of mechanical properties, magnetic properties and production performance.