To grasp the typical case has radiated into the various walks of life as a kind of leadership skill and artistic technique,and has also been advocated and promoted widely as a kind of common used method in work.It is not only involved with the methods and artistic problems of leaders,but also the logical reasoning and scientific methods from the methodology of common sense.Thus,＂grasp＂here is a systematic project,the process is complex and the conclusion is possibly right or wrong,and the conclusion will get the misleading effect if the typical case is grasped improperly.This article studies how to grasp the typical case from the perspective of logical reasoning.Its aim is to provide some valuable reference for the methods of grasping the typical case.