The section on reading occupies quite a large amount of space in the Philosophical Investigations(PI)and Wittgenstein makes little changes to it in the course of composing the book.This shows that the section on reading is important.This paper analyzes Wittgenstein's treatment of the philosophical problem of reading in detail.It shows that Wittgenstein rejects six philosophical ideas about what reading is and employs three different methods.This paper also shows that the section on reading is not only important for grasping Wittgenstein's discussion on understanding,but also for comprehending the whole of PI.