Learning, thinking, practice and enlightenment, just like the spring, summer, autumn and winter of a year, are different stages of development of the same whole. At present, our style of study is generally good, but there are also problems of learning without thinking, thinking without practicing and practicing without understanding to varying degrees. Therefore, we advocate combining learning, thinking, doing and understanding from the perspective of connection as a concrete action to improve the style of study; We are opposed to separating learning, thinking, practice and understanding, and only know point to point without connecting them. Every discipline inspection and supervision cadre should regard learning as an important task, closely link with his own thoughts and work practice, constantly improve his own quality and self-cultivation through study, thinking, practice and understanding, improve his ability to perform his duties and supervise, and live up to the trust and expectations of the party and the people.