This paper investigates on analyzing studies on effect of Polypropylene fiber with bottom ash-based cement mortar. An experimental study was conducted on the cement mortar reinforced by the different percentages of polypropylene fiber (0, 0.25, 0.5, 0.75 &1%) with partial replacement of sand by bottom ash (0%, 5%, 10%, 15% & 20%) of cement mortar 1:2. Different tests have been carried out to determine mechanical properties like the flow table test, compressive strength and flexural strength at age of testing 3, 7, 28 days was conducted on reference and polypropylene fiber reinforced with bottom ash based cement mortar specimens. The results show that the use of polypropylene fiber gives an unambiguous improvement in these properties and bottom ash thus the optimum percentages for this fiber have been taken into consideration. The results show a significant increasing in compressive strength and flexural strength with the increment of fiber content in cement mortar. It is also observed that addition of bottom ash and Polypropylene fiber leads to reduction in workability of cement mortar.