Abstract: Study and analysis of different experimental researches for different columns external strengthening by using fiber reinforced polymer composites and review. The focus is on the experimental results as well as analytical and numerical research contributions in the review. Different columns were reviewed (rectangular, cylinders) and structural behavior of each type is discussed briefly, analysis and discuss the effects of various parameters such as shape of column section, thickness of FRP sheets, direction of fiber, etc. A new model has been proposed in this study for the compressive strength, ultimate axial strain and Validation of the proposed model based on the results of the seven studies and the results were close to the experimental results. At the end provide important observations contribute along with possible future directions of research.