The development of nanotechnology continues to grow. The use of Nano cement in concrete is expected to reduce the number of pores and improve hydration in concrete and provide more strength to the concrete. The use of natural fibers, in this case, coconut fiber can prevent cracks in concrete and make fiber concrete more ductile than ordinary concrete. The effect of using Nano cement on coconut fiber concrete on the strength of the concrete to be studied. Methodology to complete the research objectives, use Nano cement used in concrete which has added coconut fiber. Tests reviewed the value of slump and specific gravity. Then, testing the compressive strength at 7, 24, 28 days. The results obtained were an increase of 48.19% in the strength of concrete. Further research needs to review on mixing Nano cement with other natural fibers.