Abstract: This paper gives a concise study of I.C. Analysis. Moreover, this is a method of sentence analysis which was first mentioned by Leonard Bloomfield and developed further by Rulon Wells. As we know, the practice of I.C. Analysis is now widespread. This paper starts with a brief introduction of I.C. Analysis and explores what is I.C. Analysis. It also gives illustration of how sentences are analyzed and divided into constituents in the large construction. Then it discusses what is ICA, and its approach and frame. In this paper we also know how to analyze the ICA and how we analyze ICA sentences and it also discusses what are the limitations of ICA.