Abstract : Column One of the most important structural components, columns transfer the weight to the foundations immediately. Therefore, their exposure to any variables or any severe conditions, such as corrosion, may result in the columns buckling, which might lead to the structure collapsing. This manuscript aims to investigate how steel fiber and type of water may reinforce for R.C. columns. In the last few years, the use of steel fiber has been verified in reinforcing. Many researchers have examined concrete beams, columns, and slabs. Investigating the impact of using fiber reinforcement reinforcing polymer on the strengthening of R.C columns after mixing with variable water (fresh water, sea water, and 50% fresh water +50% sea water) is one of the key goals of this study. Twelve short columns made of reinforced concrete make up the experimental program. Nine columns with varied weight percentages of steel fiber (16%, 33%, 50%) from total Required RFT were examined, three of the twelve specimens were evaluated solely, 100% Pure water was considered for the other three specimen one column served as the control column and was tested then. Also pouring 18 cubic and 12 cylinder (3 specimen seawater, 3 specimen pure water,3 specimen”50% seawater +50% pure water) were examined in 7 day and the same number for 28 days to consider strength in our experiment. we observed that using sea water in mix raised the effect of compressive It’s calculated that the load bearing capability of reinforced concrete columns was found to be decreased by adding steel fiber in various volume of glass fiber, according to experimental date.