In our work experimental investigation is carried out to study the different strength characteristics of concrete with partial replacement of cement with ground granulated blast furnace slag (GGBS) and an addition of steel fiber. In this investigation of M30 grade of concrete, cement is replaced with GGBS ground granulated blast furnace slag (10%, 20% and 30%) by weight and addition of steel fibers with different aspect ratio of 79 & 55 in different percentage (0.5%, 1% and 1.5%) to the weight of concrete. Economical and technical analysis has been done on GGBS and steel fiber concrete. workability of concrete and Strength of concrete was determined by performing compression test (150mm x 150mm x 150mm) size cube, split tensile test (150 mm diameter and 300 mm length cylinders) and flexural strength (100 mm x 100mm x 500mm) size beam. Finally, the strength performance of slag blended fiber reinforced concrete is compared with the performance of conventional concrete.