The development of computer technologies help enrich the content of Eng-lish education and provide more convenience for English learning. English grammar is one of the basic elements and affects the expression and recep-tion in English listening, speaking, reading and writing directly. How a stu-dent masters English grammar has a critical impact on his or her overall English level. This paper attempts to achieve personalized check and diagno-sis of college students’ English grammar. by integrating relevant computer theories and learning theories. With the help of Visual Studio and SQL computer technology, we can achieve functional design and database design for personalized grammar check and diagnosis for both learning and teach-ing. The pa...